Car stutters when it starts [Archive] - GrandAmGT.com Forum

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KennyP.
07-11-2012, 08:24 PM
I have a 2004 Grand Am SE2. Only mod is a CAI. When i start my car after it has been sitting for a while, so cold start, it has a really rough idle and sits at about 1200 rpms. If its thrown into gear the whole car thumps repeatedly and is very uncomfortable. I found that once i start the car and let it sit for 5 minutes or so the RPMs will drop and it will go back to normal with no problem. But this happens every time i start the car after it sits for even an hour. What could be the problem?

chris_gt_74
07-11-2012, 09:24 PM
Not sure about the rough idle but these cars normally idle higher when cold and gradually settle in to their normal idle speed once it warms up.

KennyP.
07-12-2012, 02:20 PM
Im considering it might be the fuel pump going out