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: P0701 and limp mode - 2006 Ford Freestyle

Hello - the P0701 is a generic problem code which is set by the transmission, but there should be other codes, because there are other possibilities that will trigger this code. A throttle position sensor, whether dirty or malfunctioning, can...

Q: Got my fuses checked and my headlights still don't work but high beams do what else could it be

It is possible both bulbs are burned out. The filament in each bulb should be tested with an ohmmeter. The bulbs can also be powered off the car to see if the filaments work but be wary of short circuits...

Q: My tachometer isnt working correctly

The two most likely causes of this issue would be the sensor that controls the tachometer or the gauge cluster itself. I would recommend having the sensor inspected and tested first to determine if it is performing correctly. If the...

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.