Q: Q: My car will start, but will not run

asked by on

driving home on the freeway in stop and go traffic jam, car ran out of power. was able to pull over before car died. waited a couple of minutes and car started up. Made it home, but now car won't run. It starts when the key turns, but won't idle and immediately dies. it dies before I am able to press the gas to see if i can rev it. could it be the IAC, or is it a more complicated fuel issue? any way to tell at home?

My car has 190000 miles.
My car has an automatic transmission.

This may be a sign of a failing 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. This valve is controlled by the vehicle’s computer which will adjust idle speed based upon indicators such as engine temperature, intake air temperature and electrical system load or voltage.

As you accelerate and engine RPM increases, and then let off the gas, the RPM slowly returns to the normal idling speed with the help of the idle air control valve. However, when the engine RPM drops below the normal range of 750-800 RPM (for most cars), this may indicate a dirty or faulty idle air control valve. In cases where this valve is clogged or failing, your vehicle will stall instead of slowing to an idle after the release of the throttle as you have described.

I would recommend having an expert from YourMechanic come to your location to diagnose the starting issue and repair your idle air control valve as necessary.

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: My car will start, but will not run

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: What does the rear park aid feature do in the message center?

If your car is equipped with the rear park aid system, you can access some of the functionality for that through the message center. The rear park aid system is optional equipment, and is designed to provide assistance when backing...

Q: 1983 toyota corolla 69k miles on it and when I'm driving it acts like it wont take any gas.

If the exhaust smells like gasoline, the fuel mixture is either way too rich or you have a weak ignition system that is not burning the fuel efficiently. You can pull spark plugs out to check them and if they...

Q: White smoke coming from the water pump out of radiator hose outlet

Hi there. Assuming, proper procedure was followed replacing the head gaskets. The original cause for overheating must of been overlooked. The thermostat stuck closed, the radiator restricted, the radiator cooling fan(s) inoperative. The cylinder head and/or cylinder head gasket issue...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...