Q: Car feels like it will die when stopping or taking a slow corner.

asked by on

Has been an off and on problem for years. As I slow down with my foot off the gas, my RPM's drop super low, sometimes the car dies, sometimes the RPM goes back up to a steady idle. Just cleaned the battery posts and cables. Didn't fix the problem this time, but that seems to have worked a few years ago. Checked the connections to my alternator and they seem solid.

My car has 130000 miles.
My car has an automatic transmission.

What you are describing sounds like a dirty or 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 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. Car feels like it will die when stopping or taking a slow corner.

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: Q: Gas problems

Some older vehicles do not have a baffle on the fuel pump, to prevent rapid changes in fuel level when turning. This may be normal for this vehicle. Fuel milage can be affected by several items like failing sensors, mechanical...

Q: transmission shifting harsh and/or delayed

The rpm's "skyrocket" is normally an indication of substantial clutch wear within the transmission. Considering the 313,000 miles, this is most likely the case. If the fluid & filter replacement didn't make any change in performance, you should take...

Q: Tires making whining noise.

The tread wall of the tires need to be checked for abnormal wear. Inspect the tires to ensure no steel chords are exposed on the tire. Run your hand across the inner and outer edges of each tire to see...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...