Car Starts Then Sputters and Dies Again

Dan Ferrell writes about practise-it-yourself automobile maintenance and repair. He has certifications in automation and control engineering science.

An engine stall condition can be acquired past many unlike systems or components.

Photo License: CC0 Public Domain

When your auto engine starts only stops afterwards, whether immediately or later a few minutes, there could be one or more than specific systems or components behind the failure. For example:

• the ignition or injection system
• a low idle speed in need of aligning
• a maladjusted carburetor
• vacuum leaks
• one or more than bad sensors

To make matters worse, stalling may happen under one or more operating conditions. For instance, the engine may:

• stall equally presently as it starts
• stall during idle
• stall when warm
• stall intermittently nether any condition

The conditions associated with your stalling problem will give you lot clues as to what systems or components are causing your trouble.

And so the best manner to start your diagnostic is to identify, when possible, the weather under which the stalling occurs, and focus your attending on those systems or components associated with the failure nether that particular condition.

How to Investigate and Diagnose Your Trouble

The following sections discuss unlike operating conditions associated with stalling, and which systems and components are most probable to crusade stalling under those conditions. The final section focuses on what to exercise when stalling happens intermittently and seemingly randomly.

So, start by checking those components or systems in the section that best describes your particular engine trouble, and and then, if necessary, move on to systems or components described in other sections, especially if you suspect these systems demand maintenance or take given you problems in the past. This approach will make it easier for y'all to diagnose the trouble much faster and volition work in nigh cases.

Cheque for Codes

Also, be sure to check the computer system for whatever diagnostic problem codes (DTCs) that might exist stored in memory, whether the "check engine" low-cal has come on or non. I or more than sensors may accept triggered a pending code. If you don't have a scanner tool, you may be able to take your vehicle to a local automobile parts store to get the codes retrieved, or the store may lend y'all the scanner. Better withal, buy a relatively cheap but quality automotive scanner from your local auto parts shop or online.

A Tip: The Anti-Theft Organisation

If you've seen the anti-theft light blinking recently, make sure the anti-theft organization is working properly. The system itself can be the source of the problem. Sometimes yous need to reset the organization (make the system go through a re-learning procedure) to get the engine working correct once more. If necessary, consult your vehicle repair manual.

Alphabetize
I. If Your Engine Stops Immediately After It Starts
2. If the Engine Stalls at Idle
Iii. If the Engine Stalls at Idle Unless You Press the Accelerator
IV. If the Engine Starts When Common cold but Stops When Warm
V. If the Engine Stalls Intermittently

Your engine may stop equally soon as you let the key return from the Outset to the Run position. Most of the time, this status points to a badly clogged fuel filter or an ignition switch in need of aligning or with worn/burned contacts.

A quick test to see if yous have a problem with the fuel arrangement is by using carburetor cleaner or starting fluid:

1. Carefully disconnect the air cleaner outlet tube from the throttle body.
2. Ask an assistant to start the engine.
3. Every bit before long every bit the engine catches and the ignition fundamental returns to the Run position, spray some carburetor cleaner into the throttle body.
4. If the engine idles momentarily with the carburetor cleaner, there may be a problem with fuel commitment.

The trouble can be with the fuel filter, fuel pump, ballast resistor, or fuel pressure regulator.

Start with the fuel filter. When was the terminal time you replaced the filter? Check the fuel filter service interval in your motorcar owner's manual or repair manual. If the fuel arrangement uses an in-line filter:

• Remove the filter.
• Blow through the filter in the management of fuel flow.
• If air goes through with difficulty, or non at all, in that location's your problem

Coil to Keep

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When necessary, utilize a fuel pressure gauge to check system pressure. Follow the instructions in your vehicle repair manual. If you don't accept the manual, you can buy an cheap, aftermarket re-create at your local machine parts shop or online.

Other components that can cause you lot trouble are:

• fuel pump
• fuel injectors
• engine coolant temperature (ECT) sensor (encounter the next section)
• fuel pressure regulator
• crankshaft position (CKP) sensor

Usually, a bad CKP will trigger the bank check engine light (CEL). So scan the figurer for DTCs if you haven't done so however.

To exercise a quick check for potential CKP problems:

• While, cranking the engine, pay attention to the tachometer on your dashboard.
• If the RPMs remain at zero, this may point to a problem with the CKP sensor.

Cheque your vehicle repair manual to help you test the crankshaft sensor, if necessary. Even if the sensor itself is good, in that location could be an electrical open or short in the circuit.

Check the ignition switch:

If you seem to be getting good fuel supply, and the previous tests didn't yield any clues, endeavour checking the ignition switch. Ignition switch contacts article of clothing out over time.

Sometimes, you can detect problems with the contacts by holding the key forward in the Commencement position when cranking the engine. The engine may take hold of in the Kickoff position, but every bit soon equally you let the key return to the Run position, the engine dies.

1. First gain access to the ignition switch. Consult your vehicle repair manual.
2. Make sure the switch is properly connected to the electrical connector.
3. Squeeze the switch and electrical connector together with your hand equally you try to starting time the engine.
4. If the engine starts and remains idling while belongings the switch and connector together, y'all need to properly connect the switch.

Even if this quick test doesn't yield results, you volition still want to troubleshoot the ignition switch. Your vehicle repair manual may help y'all here.

Cheque for throttle torso and throttle plate buildup:

Also, cheque your throttle torso and throttle plate for coking. Carbon buildup will prevent proper operation of the throttle valve. If the valve doesn't have free motility, information technology tin can crusade a rough idle and stalling with lite buildup. Coking usually causes the engine to die immediately after the engine starts.

You can use carburetor cleaner to remove carbon buildup from the throttle bore and valve, if necessary.

Verify that the ignition arrangement has a adept, potent spark.

Photograph license: CC0 Creative Commons

II. If the Engine Stalls at Idle

Various components and maintenance issues may crusade an engine to stall when idling. The source of the problem may differ with the type of engine model or configuration.

Ignition System Bug

The system may have a weak spark or the spark may fail to reach the spark plugs.

• Beginning past checking the service schedule for the spark plugs and spark plug wires.
• Remove and check one spark plug at a time.
• Bank check the electrodes' gap using a wire guess and compare to specs in your vehicle repair manual.
• A plug that burns the air-fuel mixture correctly has a brown to grayish-tan color. Other colors may point problems with the fuel, ignition or even mechanical issues.
• A wet plug may signal too much fuel reaching the cylinder, or a mechanical trouble that is leaking oil into the combustion bedroom like worn-out rings, cylinders or valve stem seals.
• And so, cheque the spark plug wires and ignition coils with the help of your vehicle repair manual.
• If your engine uses a distributor, cheque the cap likewise for cracks, carbon traces, and oil contamination.

Bad canister vent valve:

The evaporative emissions (EVAP) control arrangement routes fuel vapors into a canister and then to the intake manifold where they are burned along with the air fuel mixture.

But a organization failure, especially a failure of the canister vent valve, tin can cause the engine to stall at idle or during acceleration. Consult your vehicle repair transmission for valve testing procedures in your particular vehicle model.

Other system components to cheque, depending on your particular model:

• purge solenoid or valve
• canister
• relief valve
• hoses

Checking the PCV Valve:

The positive crankcase ventilation (PCV) organization purges blowby gases from the engine. Almost PCV systems make use of a small valve to route blowby gases back into the intake manifold to be re-burned. Over time, the valve may get stuck open, causing too much air to period into the intake manifold during idle or acceleration, which tin cause the engine to stall.

You can easily remove the valve and check it by shaking the valve. If the valve doesn't rattle, probably the valve is stuck. But this mutual test doesn't work for all models. Consult your vehicle repair manual, if necessary.

A Bad Throttle Position Sensor (TPS)

The TPS monitors the angle opening of the throttle valve and sends this information to the electronic control module (automobile calculator). The computer uses this data, along with signals from other sensors, to adjust air-fuel ratio, ignition timing and other outputs.

Most TPS units use a variable resistor with several contact points that tin can wear out and fail after miles of service. When the contacts open, information technology may cause the computer to lean the mixture besides much and stall the engine. A bad TP sensor usually triggers a diagnostic problem lawmaking (DTC). Then you tin retrieve the code from the computer using a scanner tool.

Whether or not y'all detect a problem code for the TPS, information technology's a adept idea to exam the sensor using a digital multimeter:

1. Unplug the sensor electric connector.
2. With the engine off, measure resistance across the sensor terminals with the throttle in closed position, at one-half throttle, and at full throttle.
3. Compare your resistance measurements to the specifications listed in your vehicle repair manual.

One or more bad fuel-injection components may cause the egnine to stall.

Photo courtesy of Vegavairbob on Wikimedia

Checking the IAC (for Engines With Multiport Injection Systems, Most Modern Engines):

In most cases, the trouble here is associated with the idle air control (IAC) valve.
The IAC valve is controlled by the figurer and allows air to bypass the throttle valve nether idle or common cold temperature conditions to prevent a rough idle or keep the engine from stalling. You lot tin can examination the IAC valve using a digital multimeter:

1. First, unplug the IAC electric connector.
2. Turn the ignition cardinal to the On (run) position but don't starting time the engine.
3. Ready your voltmeter to twenty Volts range (or above fifteen Volts) on the DC (straight current) calibration.
4. Connect your black meter lead to ground (engine metal surface or bombardment negative post, for instance) and with the red meter lead probe the terminals on the harness side.
5. Yous should become effectually x to 12 volts, approximately, from one of the terminals. This is the incoming betoken from the engine control module (automobile computer). If not, there are issues in that side of the circuit.

Now measure the condition of the valve by measuring resistance across the IAC connector terminals.

1. Set your voltmeter to ohms for this measurement.
2. You should become anywhere from 6 to 13 ohms of resistance.

To cheque for a possible internal curt:

1. Check for resistance from each IAC connector last and the IAC valve trunk with your voltmeter.
2. You lot should get around 10,000 ohms of resistance.

Checking the internal physical condition of the IAC valve:

A blocked IAC may cause the engine to dice every bit soon as information technology starts if the valve sticks close. IAC valves may fill up with carbon deposits overtime, preventing the pintle from moving, or blocking valve passages.

On nearly vehicle models, the IAC valve is readily accessible and can be removed easily by unscrewing a couple of mounting bolts.

1. First, turn the ignition primal off and remove the key.
2. Unplug the IAC valve electric connector.
3. Unscrew the valve mounting bolts and remove the valve from the vehicle.
4. Cheque the valve'southward pintle and housing for carbon buildup. If necessary, clean the valve with carburetor cleaner and a soft rag to remove deposits.
5. Also, check the valve O-band. Information technology should be soft and in good condition. Otherwise, replace it.

Consult your vehicle repair manual for the recommended testing procedures for your particular vehicle model, if necessary.

Your particular fuel injection organisation may have other necessary adjustments. For example, you may demand to arrange

• the idle speed
• the throttle cable
• the throttle plate stop
• the idle air-fuel mixture

Consult your vehicle repair transmission, if necessary.

Troubleshooting the ECT (Engine Coolant Temperature) Sensor

The ECT measures engine operating temperature and sends this data equally electrical information to the computer. The car calculator uses this information, and information from other sensors, to adapt ignition timing for better engine efficiency.

Thus, a bad ECT sensor can have a direct impact on engine performance. If the sensor causes a lean air-fuel mixture the engine may idle rough or stall.

Most ECT sensors utilize a thermistor to vary the voltage signal sent to the computer according to engine coolant temperature. The higher the coolant temperature, the lower the sensor resistance and higher the betoken voltage.

To test the ECT sensor:

1. Locate the sensor. Information technology's usually close to the thermostat housing.
2. With the engine turned off and cool, unplug the ECT sensor electric connector.
3. Gear up your digital multimeter (DMM) to the ohms scale and mensurate resistance beyond the sensor terminal. Make a note of the resistance value.
4. Plug in the sensor electrical connector and start the engine. Let the engine idle for about 15 or xx minutes and so that information technology reaches operating temperature.
5. Shut off the engine.
6. Unplug the ECT electric connector and measure resistance across the sensor terminals equally you did in stride iii.
7. This time, sensor resistance should be considerably lower. For example, depending on your detail sensor configuration and engine model, the sensor may accept 40K ohms when the engine is cold but 2K ohms when hot.
8. Compare your results to the specifications listed in your vehicle repair transmission.

A declining ECT sensor can trigger the check engine calorie-free. If your sensor checks Okay during your tests, only the computer says there's a problem with it, cheque the sensors circuit between the ECT and the computer for bad connections or damaged wire.

Too, check that the computer is sending the right reference voltage to the sensor.

• Unplug the ECT sensor electrical connector.
• Turn the ignition key to the On position, but don't start the engine.
• Measure the voltage at the harness connector (the ane leading to the figurer) with your voltmeter.
• Commonly, you lot should read near 5 volts at the connector. If not, in that location's a problem in the circuit.

Checking for a Stuck EGR Valve

The exhaust gas recirculation (EGR) systems reintroduces exhaust gases into the combustion chambers to reduce engine temperature and poisonous emissions.

It is common for the EGR valve passages to get blocked from carbon buildup. Carbon deposits may preclude the valve from closing, causing the engine to stall at idle. Also, an EGR valve may leak through the base, causing the engine to stall at idle, at deceleration, or during a quick cease.

If y'all've never checked nether the valve, or it's been a few years since y'all final checked, it might be a good idea to take a wait now. Simply make certain to accept on hand a gasket replacement. You may need to install a new one. If you can't discover 1 for your particular vehicle model, you still can buy gasket newspaper at your local motorcar parts shop and make the gasket yourself.

• About EGR valves are accessible and not difficult to remove. Check the EGR valve configuration for your particular model, though, to make sure you have all the tools necessary for the job. Usually, all you need is a couple of wrenches, a ratchet, the appropriate socket sizes and, sometimes, a pipe wrench to disconnect the valve from the frazzle pipe. Consult your vehicle repair manual, if necessary.
• Remove carbon deposits from nether the valve and intake ports using carburetor cleaner. Make sure not to let carburetor cleaner to achieve the valve diaphragm or any electrical circuits, depending on your detail model, or you may ruin the valve.
• Reinstall the valve using a new gasket, if necessary.

Checking the EGR Valve:

Depending on your item EGR valve configuration, you probably can stick your finger through the underside of the valve and try to move the internal diaphragm. If the diaphragm doesn't move, it may exist stuck.

Hither are a couple of alternative methods to check for diaphragm movement:

• Operate the accelerator linkage with your paw to increase engine speed. You may be able to see the diaphragm moving using a mirror placed under the EGR valve. If you can see the diaphragm with the mirror, only you lot tin can't see information technology moving as you operate the accelerator linkage, the diaphragm might be stuck.
• You can also use a hand-held vacuum pump. You lot can do this test with the engine off and using a mirror to watch diaphragm motion. Disconnect the vacuum hose form the valve and connect the vacuum pump instead. Apply nearly 15 in-Hg of vacuum to the EGR valve while watching for diaphragm movement with the mirror. If the diaphragm doesn't move, it might exist stuck.

Another cause for the valve diaphragm to fail is wearable or damage that causes it to leak frazzle gases. A quick way to examination for a leaking diaphragm is using carburetor cleaner.

• Block the wheels using wooden blocks.
• Set your manual to Park (automatic) or Neutral (standard).
• Start the engine and pop the hood open.
• Spray a quick burst of carburetor cleaner under the valve, towards the diaphragm.
• If the engine RPMs increase when you spray, the diaphragm is leaking and you demand to supplant the valve.

Bad Catalytic Converter

A bad catalytic converter can also cause you bug at idle. Depending on the detail problem, it may show other symptoms equally well:

• a olfactory property of rotten eggs
• rattling sounds
• poor engine power

One of the most common problems with a catalytic converter is a plugged unit. The internal substrate becomes partially restricted or disintegrates.

Usually, bug with the catalytic converter trigger the check engine light (CEL). The computer may store a P0420 through P0423 code. If you find a catalytic-converter-related lawmaking, do troubleshoot the catalytic converter before replacing it, to confirm that the cat is in fact bad. Catalytic converters are expensive and yous need to brand certain that another components is non involved in the problem. If necessary, consult your vehicle repair manual.

Checking the IAC on Vehicle Models With Throttle Trunk Injection (TBI) Systems:

Many vehicles equipped with TBI systems likewise have an IAC valve controlled by the computer.

• Yous can use the test described in the previous department, if your vehicle has an IAC valve.
• Too, some of these systems may have an idle speed adjustment (consult your repair manual),

Commonly, you can adjust idle speed by hooking up a tachometer (some digital multimeters accept this characteristic) to the engine. So, you can turn the idle speed screw on the throttle torso or carburetor until the RPMs are set according to specifications.

Carburetor worn out components tin cause the engine to dice.

Photo courtesy of Uberprutser on Wikimedia

Diagnostics on Vehicles With a Carburetor

A stalling issue normally points to a maladjusted idle mixture screw. To reset the screw:

1. Locate the idle mixture spiral.
2. With the engine off, bottom the screw.
3. Back out the screw ii 1/two turns.
4. Start and idle the engine.
5. Make the final adjustments until you become a smooth idle.

On some carburetor models, you may also need to accommodate adjourn idle speed. Consult your repair manual.

On carburetors in need of maintenance or worn parts, in that location tin be several components that need attending. For case, y'all may demand to check:

• throttle dashpot aligning
• bowl fuel level
• idle arrangement for bottleneck
• carburetor flooding
• vacuum leak
• float needle valve operation
• restriction in the air cleaner

Consult your vehicle repair transmission.

Sometimes, using the accelerator pedal can keep your engine from stalling.

Photo courtesy of ScrewsHirsch on Wikipedia

III. If the Engine Stalls at Idle Unless You Printing the Accelerator

This may bespeak problems with the fuel system. The following video shows an engine with this trouble.

If your engine has a throttle trunk injection (TBI) organisation:

1. Popular the hood open and remove the air cleaner assembly then that you have access to the throttle trunk.
2. Plow the ignition key to the On position just don't start the engine.
3. Take a expect at the injector(southward) on top of the throttle body.
4. If the injector(s) is leaking fuel, so you lot need to replace it. The injector may have a worn or inoperative return spring or valve; or dirt may take the valve stuck in the open position.

Besides, check fuel organization pressure level using a fuel pressure gauge. Consult your vehicle repair transmission.

If your engine has multiport fuel injection system:

Checking fuel injectors for leakage on this type of organisation can be tricky, depending on your particular vehicle and engine model. Consult your vehicle repair manual near detaching the fuel injectors from their ports for inspection, if necessary.

Another potential trouble could be the fuel pressure regulator.

1. Locate the pressure regulator on the fuel rail.
2. Detach the vacuum hose from the pressure regulator
3. Closely inspect the regulator port and inside the vacuum hose for signs of fuel
4. If you notice gasoline in either component, supercede the fuel pressure regulator.

Fuel delivery system leaking:

Although rare, the cause of a stall may come up from a leak in the fuel delivery arrangement, specially the fuel pump. The engine may receive fuel only not plenty to keep the engine running.

The leak may exist located in the fuel pump assembly, or along the way up to the fuel runway.

Check for strong fuel odors or wet spots around the fuel rail, fuel hoses and tubing, around connectors. Also, you may need to check the fuel pump associates.

Encounter your repair transmission for more fuel organization tests, if necessary.

A bad electric circuit in a gyre or ignitino moduel may cause the engine to stall when warm.

Photograph courtesy of Cschirp on Wikimedia

IV. If the Engine Starts Merely Stops When Warm

An engine tin can also stall when reaching operating temperature or a few minutes later on a cold start.

Sometimes, this tin can be a sign of issues with an:

• ignition coil
• ignition module (depending on your vehicle model)
• fuel pump
• crankshaft position (CKP) sensor
• camshaft position (CMP) sensor

It usually happens when an electric "open" exists in the internal circuit of ane of these components. After a few minutes of functioning, heat may cause a coil or wire to expand and loose electrical contact. Yous may not be able to first the engine again until the rut in the troubled component has dissipated. Later, when heat causes the open to manifest itself again, the engine may stall again.

Trying to notice the faulty component tin be hard. But hither are a few simple procedures to get you going.

When the engine dies, bank check to see if you accept spark:

1. Disconnect ane of the spark plug wires from its spark plug.
2. Identify the tip of the wire about 2 inches away from the engine surface or a metal bracket using a pair of insulated pliers.
3. Have an assistant creepo the engine and see if there's spark.
4. You should see a strong, blue spark betwixt the tip of the wire and ground.
5. If in that location's no spark or you need to take the wire about 1/4 inch shut to ground for a spark, probably the fault is with the ignition module, ignition coil, CKP or CMP.

When there's spark, check for the presence of fuel:

1. If you have a fuel pressure gauge or can borrow i from your local auto parts store, connect the gauge and idle the engine.
2. Monitor the judge and see if the fuel system looses pressure when it stalls. If it does, you may take problems with the fuel pump or a organisation component.

Y'all tin can as well check for weak fuel pressure using this simple method:

1. When the engine stalls, remove the air cleaner assembly and spray some carburetor cleaner or starting fluid at the throttle and try to start the engine or have an assistant crank the engine while yous spray a burst of carburetor cleaner into the throttle body.
2. If the engine catches or starts for ane or ii seconds when you lot spray the fluid, and so you may accept a problem with the fuel pump or some other system component.

Check the fuel system with the help of your vehicle repair transmission.

A bad circuit in a CMP can forbid the engine from idling.

Photo courtesy of Teresa Trimm on Flickr

5. If the Engine Stalls Intermittently

If your engine stalls intermittently, under a variety of conditions, suspect these components:

A Bad Camshaft Position Sensor

A bad camshaft position (CMP) sensor can produce different types of symptoms and crusade the engine to stall immediately later on starting or intermittently.

A bad camshaft sensor is likely to trigger the check engine light (CEL). Even if y'all don't see the CEL illuminate, scan the computer memory for diagnostic problem codes (DTCs). Common bad camshaft DTCs range from P0340 to P0344.

Consult your vehicle repair transmission to locate and test the camshaft sensor, if necessary.

Misfires

Engine misfires are another cause for an engine to stall. Misfires make popping sounds and can cause engine to jerk or vibrate. Other symptoms include:

• increased emissions
• increased fuel consumption
• difficulty starting
• stalling

If you've noticed engine misfires, this might be the cause for the engine to stall. Check this other article to help y'all diagnose the source of the misfire.

Clogged air filter

You lot can remove the air filter and check information technology. Air filters trap clay and dust from the stream of air flowing into the intake manifold. To check the filter:

1. Remove it from its housing.
2. Place the filter against the sunday or a practiced source of light.
3. If the light can barely get through the filter element, or not at all, the filter is clogged and preventing proper air menstruation into the engine, causing it to stall.

Vacuum Leaks

An engine stalling outcome can also come from a vacuum leak problem.

A vacuum leak tin upset sensors or actuators that depend on vacuum for operation: for example, the manifold absolute pressure (MAP) sensor, exhaust gas recirculation (EGR) valve or mass air menstruum (MAF) sensor. The leak can happen because of loose or damaged hoses or gaskets.

Testing one of these sensors requires checking the vacuum hose, electric connection and wires, and testing the sensor itself. Consult your vehicle repair manual. On a MAF sensor, check for a muddied sensing element. You tin clean the sensing element using MAF sensor cleaner or electric contact cleaner. Follow the product instructions when using this type of cleaner.

Vacuum leaks usually make a hissing sound simply you may demand a mechanics stethoscope or a length of hose to listen and locate potential vacuum leaks.

• Check that all vacuum hoses are properly continued.
• Check the condition of each hose.
• Utilize the stethoscope or length of hose to listen for leaks along the vacuum hose and connections.
• Trace each hose with your hand to experience for potential impairment: soften, harden or irregular spots.
• Bank check for vacuum leaks around the intake manifold gasket and throttle body as well.

It's Worth Trying to Diagnose An Engine That Shuts Off

If your engine starts only won't stay running, you lot want to make an accurate diagnosis equally shortly as possible. Making a diagnosis tin exist hard, especially when yous don't take much feel in car repair and the source of the trouble can be in one of several systems. Use the strategies outlined in this guide. They'll help you repair your automobile faster by having you concentrate on those systems more likely to give you problem.

This content is accurate and true to the best of the author's noesis and is not meant to substitute for formal and individualized advice from a qualified professional.

Questions & Answers

Question: Where is the problem when, after driving, I stop and it doesn't start until I give some fourth dimension. How would you diagnose my car's trouble if my car will start again after some fourth dimension?

Answer: If the engine cranks but won't showtime, check for spark and fuel pressure level. If it doesn't crank at all, check the bombardment condition.

Bank check for DTCs codes, even if y'all haven't seen the cheque engine light come on. There might be a pending code. Usually, when the engine warms up and then stops, it is an indication of a problem with an ignition curl, ignition module or even the fuel pump. Allowing time to cool, the component will office again. Attempt some of the tests described in section 4 of the post.

Question: What does it hateful when the car gets started when it is cold but not when it is hot?

Respond: Cheque the connections, wires and cables in the staring circuit. They should be clean and tight.

Question: Why does my auto shut off when I allow go of the cardinal?

Answer: At that place could be a problem with the ignition switch. Gain access to the ignition switch and see if the harness connector is getting loose. Push button the connector and switch together and try to start the engine and see if it stays running. If then, yous may want to employ a large plastic tie to secure the connection. Or you may need to replace the switch.

Question: My truck starts and within 6 seconds it dies. I cannot provide more than gas to proceed it running. If I unplug the Air Flow sensor it will start and idle only once more if I give it gas it dies. I besides started with changing out the fuel filter. No divergence. Any thoughts?

Respond: If you are able to first the engine correct afterward information technology stalls with the MAF sensor disconnected, probably this sensor is dirty or faulty or another sensor is not sending the correct signal the computer expects, probably the throttle position sensor. Download trouble codes even if you don't meet the bank check engine lite on. There could exist a pending code that can help you.

Question: I have a 1993 Caprice Classic. And most 4 months ago, I mistakenly put the wrong grade of gas in. Since and then, I've had problems as far equally when upon starting it idles very low and and then too loftier until it does ordinarily later on about thirty or so seconds. In one case I bulldoze it, I can go so far, and in one case I come to a light or stop sign information technology eventually cuts off but starts dorsum up immediately. I've heard that it could be a number of things including bad fuel injectors. What's your adept stance on this?

Answer: Information technology seems like an electric problem. Effort downloading trouble codes, fifty-fifty if the engine low-cal doesn't come on. In that location could be a problem with a sensor.

Question: My car starts and the check engine light disappears. As the engine temperature rises, the check engine calorie-free appears and my machine dies. What's the answer?

Reply: Cheque the figurer for trouble codes. If a sensor is faulty, most probable information technology's triggered a code. With temperature-related issues, an ignition whorl, fuel pump motor or sensors like camshaft and crankshaft are common.

Question: 90 Chevy. I replaced the fuel pump, fuel filter, fuel pump relay and throttle control position sensor. Truck dies at random. If watching the throttle trunk when running, fuel only stops. I cycle the key and it works again. If I don't cycle the key, no fuel comes out. Any ideas?

Reply: If the engine dies equally if turning off the ignition key, about probable the trouble is a loose wire or bad connexion either on the fuel pump circuit or throttle position sensor circuit. Double-check those circuits, including wiring harness and connectors. Cycling the central may bespeak to corroded or loose wire(s) that have too much resistance and are getting hot. Visually bank check for corrosion and tug at the wires on the connectors to make sure they are not loose or dirty.

Question: May auto engine stalls while idle unless you press the accelerator. This indicates problems with the fuel system. How do you fix the fuel system?

Answer: If you lot know the trouble is in the fuel system, first make sure you have replaced the fuel filter. And so get-go past testing for fuel pressure at idle. This other post tin can assist:

https://axleaddict.com/automobile-repair/How-to-Test-a-F...

This could lead to a bad pressure regulator or fuel pump or bad injector(s).

Question: When I endeavour to beginning my Mazda, it takes several times of it trying to turn over then information technology starts. Only sometimes information technology shakes and makes loud noises and cuts off unless you press the gas a little bit. Then it'southward practiced. The fuel pressure was checked and it is good. Why would my Mazda have trouble starting?

Answer: Seems like there is a problem with a sensor or the starting circuit. Effort downloading any possible trouble codes, fifty-fifty if the check engine light is non on. This other post may assistance equally well:

https://axleaddict.com/auto-repair/How-to-Use-Volt...

Question: I have a 2005 Park Avenue that keeps stalling randomly. At commencement, it would only stall while warming up but ran fine after it was restarted. Now, information technology starts and volition stall while driving. Sometimes I tin bulldoze across town earlier it stalls, and sometimes I can only make information technology a few blocks. After it stalls, I take to await about an 60 minutes earlier I can go on it running. Should I commencement with the crank position sensor?

Answer: Check your camshaft position sensor. There are other items you demand to check as well similar misfires, vacuum leaks, and a blocked air filter.

This other mail on vacuum leaks diagnosis may help.

https://axleaddict.com/auto-repair/How-to-Detect-and...

Brand sure to scan your computer retention for trouble codes, even if the bank check engine light is not on. In that location could be pending codes that may guide y'all here.

If the engine stalls after it reaches operating temperature (about 15 to xx minutes), there could be a trouble with the fuel pump or an ignition module.

Question: My car won't turn over. I used starting fluid and it started upwards, and then immediately cutting off. What can be the reason for that?

Answer: If the engine doesn't turn over, at that place could be something incorrect with the starter motor or the engine is seized. But, if the engine fires up with starting fluid, and so bank check for fuel pressure. Probably non enough fuel is getting to the cylinders.

Question: My car runs fine for a few minutes, and then starts sputtering and loses a lot of horsepower. Information technology doesn't stall only the engine sounds rough like an erstwhile 80s car. A night of balance lets the car go drivable over again for a few minutes but then the bug show upwards over again. I've inverse the spark plugs, plug wires, benefactor cap and rotor, air filter, cleaned the maf sensor and changed the throttle position sensor. What else could be the problem?

Respond: The problem seems to be temperature related. This commonly happens with a faulty ignition coil, ignition module or fuel pump motor'southward coil. The coil device or temperature sensitive electronics will begin to neglect from an electrical open up. Have the ignition curlicue, ignition module and/or fuel pump checked.

Question: Why does my motorcar start and idle for 3-five minutes before dying? The spark plugs and fuel filter were replaced. The carburetor was taken off, checked and cleaned. The distributor was taken off and cleaned equally well. It still does not want to idle entirely later on starting, so it cannot drive at all. Please help as the mechanic can't seem to figure out whats wrong with my auto.

Answer: There could be several causes for this, and then attempt the following:

Have the ignition system checked to make sure it has a proficient spark.

Bank check the fuel organisation- fuel pressure

Check the canister vent valve, PCV valve, TPS sensor, and IAC valve.

Question: My VW T4 runs completely fine, only when it's been in hot weather, or indeed clammy weather condition, information technology starts and instantly dies. This is intermittent. Sometimes later on it dies, if y'all attempt again it can outset straight away, or you tin can be waiting for half an hour before you can start it. Once started it runs fine. Do you take whatever ideas?

Respond: Usually, when a auto struggles to run in damp weather, the trouble is with the ignition system. A curlicue or cable in the organization is probably leaking the spark to ground.

Question: My car was diagnosed equally having a bad fuel pump. After a new fuel pump was put in, it got four miles down the route, idled out, and died again. The auto will non creepo until about 15 minutes after it happens. What exercise you think could be the cause of this problem?

Answer: If y'all hateful the engine volition non turn over, the trouble seems to be in the starting organisation circuit. This other post may assist:

https://axleaddict.com/auto-repair/bad_starter_sym...

If the engine cranks but won't commencement after the car has been driven about four miles (engine turns over but won't start), then perhaps the ignition curl or ignition module is bad. In this case, the scroll reaches operating temperature, coil breaks open up and the motorcar stops. Once the coil cools, the cleaved wire makes contact and yous are able to start the engine, and the cycle repeats.

This other mail may help y'all test the ignition coil:

https://axleaddict.com/auto-repair/How-to-Test-an-...

If your car has a coil on plug configuration, check the repair manual for your particular model to test the coils. You lot can besides check for spark right after the engine refuses to beginning. If there's no spark, you know the problem is in the ignition system (or crankshaft-camshaft position sensor) and you are on the right track.

Question: I have a 2013 Chevy Sonic. For the concluding v months, my car has stalled during driving and when in idle or when I stop at red lite and stop signs. As well, it fails to turn over afterwards putting gas. Information technology will turn over fine, but it won't stay on. I've had my fuel injector cleaned and inspected. I've had my O2 sensor replaced besides. Practise you have whatsoever ideas what this could be?

Answer: You may be dealing with a vacuum leak or a faulty sensor like a MAP or MAF sensor. You may besides accept a problem in the fuel organization or with the fuel pump. Take the pump checked before replacing it.

Question: What tin brand a auto but switch off and the battery low-cal to go along in the instrument panel? I accept tested the battery and it is good.

Answer: The virtually common reason for this is a bad alternator. Have the charging system tested.

Question: Why does my motorcar only starting time in the morning?

Answer: Cheque for any DTCs in the computer memory starting time. You may demand to take a expect at fuel pressure or ignition spark after the car has warmed upwards. Maybe at that place's a problem with the fuel pump or an ignition coil.

Question: What would be the trouble if the engine dies at intersections when reverting to first gear? I replaced the carburetor.

Answer: The carburetor may need an idle adjustment. Check the transmission, if it came with it. Or look for information technology online.

Question: Two days agone my truck shut off immediately after starting it up. The truck will accelerate past itself then shut off. It fails to restart after a few tries so information technology will start and run. Two months ago, information technology shut off while driving, so I replaced the battery and alternator and no problems for 2 months. What could cause my truck to shut off after starting up?

Answer: Information technology seems like a faulty sensor. Intermittent faults tin be hard to diagnose, though. But you lot may want to cheque the bombardment cables, engine grounds, ignition switch connector, and wiring, and faulty wiring in a critical sensor the computer relies on to operate the fuel injectors, crankshaft, throttle position sensor or camshaft sensor, for case. If the engine shuts off as if turning the ignition switch off, most probable the problem is in a circuit. A voltage drop test might help:

https://axleaddict.com/auto-repair/Automotive-Volt...

Question: When I end the car and then come back to it after but a brief period of time, it will only stay on if I call up the engine. But once I can get it going for a little bit, it stays on and runs great and idles better than it has in years, simply no one touched anything on the engine. Is it the fuel delivery or something more than sinister?

Answer: Doesn't seem like a fuel system issue. Probably an issue with the idle air control (valve or solenoid) or a sensor, possibly the throttle position sensor, that is not sending the correct signal to the computer. Try downloading problem codes, even if the check engine is not on. There could be a pending code. You may also exist dealing with a bad wire or connector.

Question: Why does my engine crank but won't stay running?

Answer: There could be a fault in the injection or ignition arrangement, a vacuum leak or some other fault. Cheque for trouble codes, fifty-fifty if you don't run into the check engine lite on. A sensor might be faulty as well.

Question: I had the fuel injectors cleaned, fuel pump checked, relay checked, new MAF sensor, new Crank and camshaft sensors, new ignition switch, and cleaned the throttle body with a carb cleaner. The alternator is good. New starter. It hard starts with starter fluid; I pushed the gas pedal a expert 10 times with zero reaction from the rpms. Then the motorcar died seconds afterward. I cannot figure it out. What could information technology be?

Answer: It seems like a bad sensor. Try downloading problem codes and see if you get a awaiting code, even if the check engine calorie-free is not on. In that location could be a problem with the throttle position sensor (TPS). If the computer doesn't go a point from this sensor, information technology may non fire upwardly the engine.

Question: With the car on jacks on an incline, the engine was running fine. I tried to drive it to a shop the side by side day. Information technology started fine, but within a infinitesimal information technology just close off. No warning or sputter, but dead. I pushed it back to the inclined driveway and and so it started fine. Could it be that what little oil was in that location pooled up towards the back of the engine and wasn't getting to the pump?

Answer: Some models volition shut off the engine if there'due south not enough oil pressure. This is a rubber mensurate to prevent astringent engine impairment. If there's not enough oil, add some and try over again. If you lot recollect in that location's a trouble with oil force per unit area, this other post may assistance:

https://axleaddict.com/motorcar-repair/What-Causes-Low...

Question: I take a 2012 Ford Focus. After getting gas and about 10 miles (16.09 km) down the route, the auto started to lose ability and so stalled. Got it started, collection a little and it did the aforementioned thing. Finally, I fabricated it home. It stalled again and at present won't start at all. I never had a problem until I put gas in it. My Ford mechanic said I need a new computer system. Could my Ford Focus' loss of power be something other than the computer organization?

Answer: First, make certain y'all got fuel force per unit area (bad fuel pump or fuel pressure regulator, clogged fuel filter). Download trouble codes, fifty-fifty if the engine light is non on. There could be a awaiting lawmaking on the calculator's retentiveness. A bad sensor can forbid the engine from starting, like a faulty crankshaft, camshaft or throttle position sensor.

Question: My engine starts, and then subsequently a few seconds engine is off by itself. And and so the dashboard displays an machine protection warning. What could be the cause of this remark?

Answer: The bulletin comes from the machine's reckoner. It'due south trying to protect the engine because of a serious mistake it has detected. Download the problem codes from the computer memory. They should give y'all an indication of the problem.

Question: My engine is a Toyota 5A FE and has no trouble starting at home (outdoor Street parking) even on a very common cold morning. However, it cranks and instantly stalls when I try to starting time it at work and only when I'm at work (Covered Parking). Whatever reason why that might be?

Reply: It'southward possible the EGR or PCV valve is sticking open.

https://axleaddict.com/auto-repair/Bad-EGR-Valve-S...

https://axleaddict.com/auto-repair/How-to-do-a-PCV...

Download problem codes, even if you don't see the check engine light on. At that place could be a problem with a sensor likewise. Promise this helps.

Question: When, subsequently driving, I stop, it doesn't start and the engine light comes on until I give some fourth dimension. How would yous diagnose my machine's problem if my auto will start again after some time?

Reply: Start by downloading trouble codes. If the check engine low-cal is coming on, at that place could be a faulty sensor triggering the light. Brand sure to test the organization or sensor indicated past the code before replacing any components. Hope this helps.

Question: My gear shift lights are not indicating on the gear after irresolute the gearbox and mechatronics. And we are failing to commencement the car Golf v i.9 TDI. What could exist the problem?

Respond: If the engine is not cranking, in that location could be a trouble in the starting circuit, perchance at the ignition switch. That could also explain why yous are not getting the indicator lights. This other post may help:

https://axleaddict.com/automobile-repair/How-to-Apply-Volt...

it'll be a good thought to take the diagram for your item model. If you don't accept the repair manual, you can become one at your local auto parts store or online.

Question: My engine starts and runs at high idle, Merely will non idle in one case warmed upwards. The merely mode I can keep it running is to up the rpm to effectually 1200 or more. I have checked plugs, wires, vacuum lines, replaced curl. I removed the gas line from carburetor and I can fill a canteen slowly equally I plough the engine over - mechanical pump. Should I replace the carburetor? It is a 4 barrel Rochester Quadrajet.

Respond: If the engine starts at loftier idle and and so dies while it gets warmed, it's possible in that location is a vacuum leak. If y'all observe a drop in RPM earlier it dies, the choke may need adjustment (too tight), the carburetor may be flooding, or the float level is very high.

Question: My BMW i series cuts off while driving, the engine will showtime and cut off subsequently few minutes, what could be the problem?

Reply: This other post may assistance:

https://axleaddict.com/car-repair/Car-Dies-While-...

Question: Hyundai ix35 2013 machine. The car starts and dies. I took out one of the airflow sensors and started the automobile. It remains on just as presently as I put the sensor back, the car dies. Please suggest?

Reply: Almost likely the air catamenia sensor is faulty. Effort testing the sensor and, if necessary, the circuit, to make sure it's bad. This other postal service may help:

https://axleaddict.com/auto-repair/How-to-Examination-a-M...

Question: My car does not stay running until it comes up to operating temperature, what could be the trouble?

Reply: There could be a problem with the MAF sensor not sending the correct signal to the computer.

https://axleaddict.com/automobile-repair/How-to-Test-a-Thou...

Ordinarily, cleaning the sensor chemical element solves the problem, using a MAF sensor cleaner. Other times the sensor itself has failed and needs replacement.

Other sources of trouble are the throttle position sensor,

https://axleaddict.com/auto-repair/How-Do-Y'all-Know...

bad fuel pressure level

https://axleaddict.com/car-repair/How-to-Test-a-F...

engine coolant temperature sensor

https://axleaddict.com/car-repair/Coolant-Tempera...

stuck open up thermostat

https://axleaddict.com/motorcar-repair/car-thermostat-...

Question: Would a speed sensor cause stalling?

Answer: Usually, you lot'll find issues with the manual, brakes, speedometer, and cheque engine light. Attempt downloading problem codes from the computer, even if you don't see the check engine light on. If there are no codes, this other postal service may aid:

https://axleaddict.com/car-repair/No-Trouble-Code...

© 2018 Dan Ferrell

cornejoshou1971.blogspot.com

Source: https://axleaddict.com/auto-repair/Why-My-Engine-Starts-But-Stops

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