Q: Stalls when slowing down or at idle

asked by on

Vehicle occasionally stutters like it wants to stall sometimes. Only happens when slowing to a stop or slowing to make a right turn. Has stalled out once but started back up right away. No dummy lights on dash. Cleaned throttle body, fuel injectors, changed spark plugs, problem remains.

My car has 131000 miles.
My car has an automatic transmission.

Hi There, It sounds like you may have a dirty or failing idle air control valve causing your engine idle to fluctuate and eventually stall. The idle air control valve is a small valve on the engine’s intake system that reads the air intake as it comes into the motor. This is controlled by the car’s ECM which uses this information to make adjustments to the air/fuel ratio depending on various inputs such as outside air temperature, intake air temperature, load and various other things. As you accelerate, your car’s engine is receiving a much higher dose of fuel than when at idle and conversely, when you let off the gas pedal, there is a sudden change in this fuel supply as a result of your foot letting off the pedal. When this happens, the job of the idle air control valve is to bring this deceleration down to a slow and smooth idle rather than suddenly cutting off the fuel supply causing the motor to die. When the idle air control valve is not working properly, this cause a disruption in this process resulting in the engine not being able to idle properly. I would recommend having a professional come to your location to diagnose and inspect your vehicle.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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
  1. Home
  2. Questions
  3. Stalls when slowing down or at idle

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: reconnecting new alternator

You are correct. The battery cable attaches to the B terminal. The capacitor is there to help smooth out the voltage spikes that the alternator produces. If you are still not comfortable with the repair, a certified technician from YourMechanic...

Q: How do I shuffle an MP3 or WMA disc?

Shuffle mode plays all of the available tracks at random. There are two different ways that you can shuffle an MP3 or WMA disc: You can shuffle all of the songs on the disc. To do so, either press...

Q: I have a 2008 Nissan Altima Coupe,It starts up just fine. If I try to accelerate in reverse or drive it seizes up and dies. It goe

It sounds as though you may be having a transmission problem. There is a fluid coupling called the torque converter between the engine and the transmission that is supposed to allow the engine to speed up and move the car...

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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.