Skip the auto shop - Our mechanics make house calls

Q: Stalling at low speeds and idle.

asked by on

Hi, my car stalled yesterday at a red light, before this happened, about a day before, the lights on my dashboard and clock/radio flickered, dimmed, and then went bright again. Right after this happened, I was braking for the red light when my car jolted forward, causing me to almost rear end someone. My foot was no where near the gas pedal when it did this. Also, when i am sitting idle, my car will rev up like I was tapping the gas, only to about 2RPM but my car will be in park. Could you please help me to possibly have some options of what this could be?

My car has 52000 miles.
My car has an automatic transmission.

You may have a dirty or failing idle air control valve. The idle air control valve reads the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and at idle. Since this valve is controlled by the vehicle’s computer, it will adjust idle speed based upon other measurements such as engine temperature, intake air temperature and electrical system load or voltage. 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. 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 repair your idle air control valve.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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: My car is making a crunching noise, even rolling in neutral. More so on uneven ground.

A hard grinding noise especially when braking is generally a sign there is a bad wheel bearing or there may be metal on metal contact on the brake rotor from a completely worn brake pad. If the grind is bad...

Q: I have an 06 Chrysler 300 all the dash lights come on the gauges fall to 0, then all lights on off and gauges go back to normal, w

Hi Rebbecca. Thanks for contacting us today. Most of the time, the symptoms you are describing is caused by an electrical short with one of the wires behind the dashboard. It can be due to a loose fitting ground wire...

Q: the transmission and coolant sensor has been replaced car wont start dodge avenger 2013

Hi there. In most cases, when you have maintenance or repair completed on a vehicle system that does not impact the starting of the vehicle (like the cooling system), and it doesn't start - it's due to something being removed...

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...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...