Question about 1992 Pontiac Grand Am

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1992 pontiac grand am no acceleration, a rough idle (engine miss)

No acceleration, a really rough idle engine has to be missing, and I can smell the fuel in the exhaust. Now for the weird part no check engine light and no codes? I changed the spark plugs, fuel filter, coils. Any ideas.

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Does it have the 2.3l Quad 4 engine? If so replace the plastic piece that the coils go into, they go bad and leak spark to the cam towers and then you get a nice one or multiple cylinder misfire.

Posted on Apr 30, 2010

  • Michael Pastor
    Michael Pastor Oct 03, 2012

    are you refering to the ignition coil boot or the ignition coil housing

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Could also be a bad map sensor vac line

Posted on Oct 03, 2012

  • Michael Pastor
    Michael Pastor Oct 03, 2012

    could also be a bad map sensor vac line

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1 Answer

Rough idle


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There are few help links with solutions to troubleshoot such idle issues.

I suggest you refer the link below and follow its troubleshooting details:------

Click the link below:-----

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http://technoanswers.blogspot.com/2012/12/ford-expedition-iac-valve-replacing.html

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http://technoanswers.blogspot.com/2012/01/bad-miss-at-idle.html

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http://repairhelpcenter.blogspot.com/2012/10/cold-start-problem-and-vehicle-shudder.html

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http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html

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http://repairhelpcenter.blogspot.com/2012/10/high-idle-problem.html

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http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

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http://schematicsdiagram.blogspot.in/2012/03/vehicle-stumbling-at-idle-and-shows.html

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http://technoanswers.blogspot.in/2012/03/rough-idlestaling-and-erratic-shifting.html

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These details will help.

Thanks.

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1 Answer

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1 Answer

2004 pontiac grand am replaced O2 sensor, spark plugs, plug wires and fuel pressure regulator. starts easily. idles very rough. When accelerating car runs well. When cruising on freeway with engine...


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1 Answer

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1 Answer

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2 Answers

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