Low idle
Thread Starter
Joined: 09-28-2022
Posts: 4
From: Washington
Low idle
Hi, I’m a newbie, and I have a question. I have a 2007 HHR 2.4 LT. after it warms up, when stopped, the idle drops down, it runs rough, and the engine gets noisy. If I give it a bit of throttle, it runs fines for a bit, but then returns to the problem. The timing chain has recently been replaced, as well as the plugs, igniters, and VVT solenoids. Throttle body has been cleaned. Transmission has been serviced. Run it on 92 octane fuel. No codes. Any help would be greatly appreciated.
Administrator
Joined: 10-13-2011
Posts: 40,083
From: Welland,Ont Canada
Welcome to the site, first off, I have to ask what you mean by igniters? Did you mean coils?
and what shark plug did you install? These Ecotec engines require AC Delco 41-103 iridium plugs, do not attempt to gap them, the electrode whiskers can be damaged easily.
have you cleaned the MAF sensor? Gentle now, use the proper sensor safe spray cleaner, same for the throttle body, no brake parts cleaner spray.
and what shark plug did you install? These Ecotec engines require AC Delco 41-103 iridium plugs, do not attempt to gap them, the electrode whiskers can be damaged easily.
have you cleaned the MAF sensor? Gentle now, use the proper sensor safe spray cleaner, same for the throttle body, no brake parts cleaner spray.
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