Final generation of the Pontiac Grand Am.

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shaking when at stop sign but not when driving

Has shaking when car is at stop and in gear. Replaced throddle sensor

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Stevo, what exact year is it? what type of transmission? Engine size? Have you checked for any OBD codes?

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Try going to an AutoZone and get a FREE computer read out to help identify problems.

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Stevo, there are quite a few things that could be causing this. I would definitely have the OBD checked and see if it gives you any codes, like engine misfire . If you do not have any codes it could be that you have a vacuum leak, bad or clogged fuel injectors or a bad MAF. Tap the MAF with your fingers and see if the engine idle changes, If it does replace it. Of course you also want to make sure that your fuel filter is good (replace it), replace your plugs and plug wires. Replace your coils as well if no change, or you can at least check the secondary resistance it should be between 5000-8000 ohms. There was also a service bulletin that

Action Number: 10002166

Service Bulletin Number: 138064

Report Date: Mar 01, 2007

Component: Engine And Engine Cooling

Summary: Multiple driveability symptoms of long or hard starts, chuggle, rough idle and light or intermittent misfire due to clogged fuel injectors." required the dealer to reprogram the PCM. As you can see, there is quite a bit that could be causing this, so good systematic trouble shooting is on order.

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Do you have any engine lights on . If not it could also be a bad motor mount

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stevo will be eternally grateful.
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