Idling Problem at Stop/ Deceleration - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
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post #1 of 1 (permalink) Old 04-21-2011, 11:02 AM Thread Starter
Join Date: Jul 2009
Posts: 21
Unhappy Idling Problem at Stop/ Deceleration

So I have been having this problem for awhile but now since it is getting hotter again it is happening even worse! I have took it to the dealer and car shop before nobody knows what it is its getting annoying. My car is not that old a 2009 with only 64,000 miles.

I have changed the fallowing to be new in the last 5,000 miles and still see this problem:
Throttle Body
Map sensor
Spark Plugs
Fuel Filter
Air Filter
Cabin Filter

But the car now stalls again after it has been running for at least 30 minutes and while at idle its the worst a a stoplight and occasionally while at cruising speed. We took the car to a friends shop that is a certified AcDelco shop to service Chevy and GM cars. It stumbled while there on his state of the art engine analyzer and it triggered no soft or hard codes so it is a mechanical problem inside the motor or a problem with the computer. We think it could be the idle control valve, timing chain, actual timing of the motor, or the ecu. All of which are covered under the warranty of the motor on the car. What do yall think? From searching these problems tend to be common has anyone else has this issue. I'm just getting old of this been happening since October.
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