Engine idles up when put in gear and take off just like put on cruise control. intake air flow?
Nov 2, 2021 at 7:50 PM
When accelerating from a stop car surges
2003 CHEVROLET IMPALA
JWM571
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Good morning,
This sounds like the idle air control valve is sticking causing the engine to surge forward.
https://www.2carpros.com/articles/how-a-idle-air-control-valve-works
I attached the procedure for you to follow below and pictures of the valve on the throttle body.
https://www.2carpros.com/articles/how-to-replace-an-idle-speed-control-motor-iac
Roy
Important: The powertrain control module (PCM) will reset the IAC valve whenever the ignition is turned On, then Off. Turn the ignition on for 10 seconds, then Off for 5 seconds.
This sounds like the idle air control valve is sticking causing the engine to surge forward.
https://www.2carpros.com/articles/how-a-idle-air-control-valve-works
I attached the procedure for you to follow below and pictures of the valve on the throttle body.
https://www.2carpros.com/articles/how-to-replace-an-idle-speed-control-motor-iac
Roy
Important: The powertrain control module (PCM) will reset the IAC valve whenever the ignition is turned On, then Off. Turn the ignition on for 10 seconds, then Off for 5 seconds.
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Nov 3, 2021 at 5:02 AM
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