Question about 1995 Pontiac Grand Am

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I have an 1999 grandam with the 2.4..number 2 is flooding the clynder...changed the injectors and i still have the same problem...

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  • dammawx7 Mar 14, 2011

    yes all the coil packs are firing..i changed the plugs also..but number 2 is still flooding...

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  • Master
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Is it flooding the cylinder? or is the spark plug not firing? Those engines are notorious for bad coils and/or coil control modules.

Posted on Mar 13, 2011

  • dttech
    dttech Mar 15, 2011

    If your coils are firing as you say, and your plugs are good, and the injector has been replaced with no change and the cylinder is "Flooding" - then the only possible cause left would be an injector control circuit shorted to ground between the injector and the PCM.

  • dttech
    dttech Mar 15, 2011

    The only problem with the shorted control circuit theory is that your vehicle fires two injectors at a time. It fires #1 and #4 at the same time and it fires #2 and #3 at the same time, so if the injector control circuit for #2 was shorted to ground, #3 would also be flooding. A shorted driver in the PCM would also cause both cylinders to "Flood" or misfire. It is definitely not caused by the PCM if it is only one cylinder.

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  • Pontiac Master
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Did you check the plug wire and spark plug? Hook a timing light up, and make sure your wire is good, and check the spark plug.

Posted on Mar 13, 2011

  • Dar
    Dar Mar 14, 2011

    You may want to do a compression test. Could be a valve or the cam, or maybe rings.

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