Q: Rough idle and car dies - 2007 Chevrolet Impala

asked by on

My car is having a rough idle at about 500 rpm and will even die at light. It turns back over but not easily. Serpentine belt does squeal from 1st to 2nd gear shift. Steering becomes hard if making u-turn or tight turn.

My car has 170000 miles.
My car has an automatic transmission.

Hey there. This is a common sign of 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. This valve is controlled by the vehicle’s computer which 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. 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. I would recommend having an expert from YourMechanic come to your location to diagnose and repair your idle air control valve as needed.

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. Rough idle and car dies - 2007 Chevrolet Impala

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: After jump-starting, warning lights came on

If you are having random electrical problems that don't seem to be related to the car not starting, it is likely that you have an alternator failure with your Mercedes E500. When an alternator fails, it can cause all sorts...

Q: P0320 code - 1999 Ford Ranger

Hi and thanks for contacting YourMechanic. What might have happened is that water from cleaning the engine may have gotten inside the engine. Check all of the intake hoses and be sure that the clamps are tight. Remove the air...

Q: How much does a shift solenoid cost? or sensor or the connector cost?

Your vehicle is equipped with a 4T65-E transmission. There are several solenoids in the 4T65-E transmission and the cost to replace will depend on how many are defective. However, prior to replacing anything the solenoid(s) must be tested (if they...

Related articles

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...