Q: Q: Car wont stay running

asked by on

ok car will start fine for about 2-3 seconds then will start shaking and dies, i check fuel pressure is ok, coils are ok, wires are new, spark plugs are ok, timing is ok, what can be the cause no cel on, also i was having trouble with the transmission but do u think that has something to do with it thanks

My car has 180000 miles.
My car has an automatic transmission.

It sounds like you may have a sticky or faulty idle air control valve. The idle air control valve monitors the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and at idle. This valve is controlled by the vehicle’s computer and will adjust idle speed based upon other measurements such as engine temperature, intake air temperature and electrical system load or voltage. This is also an important function when starting the motor as it allows the motor to run and idle on it’s own once the motor fires. When you accelerate, the engine RPM increases, and as you let off the gas, the RPM slowly returns to the normal idling speed with the help of the idle air control valve making the transition from a higher RPM back down to idle speed while adjusting the air/fuel ratio constantly to allow this to happen smoothly. When the engine RPM drops below the normal range of about ~800 RPM, this often times will cause the engine to stall indicating a dirty or faulty idle air control valve. I would recommend having an expert from YourMechanic come to your location to diagnose and inspect your vehicle.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Q: Car wont stay running

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Electric Cooling Fan Remains On Even When Car is turned off

The radiator fan will be controlled by the engine ECU (electronic control unit) through a relay. The relay is most likely your problem. When the fan shuts off, it can cause a small arc on the relay points that will...

Q: Car belts making noise.

There are several bearings in the pulley system that is driven by your serpentine belt. It is not uncommon for them to go bad occasionally and make noise. However it is also possible that your belt may be worn, or...

Q: P1336 code, crankshaft position sensor variation not learned

The code that you are referring to typically means there is an electrical problem in the crankshaft position sensor circuit. The issue is not necessarily the sensor itself and thus the output of the sensor must be viewed on a...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...