Thread: Stumped with P0300 code

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  1. #1 Stumped with P0300 code 
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    ok i have a p0300 code coming on i have changed the spark plug the wires and checked the egr and coil packs they are both good.

    have any idea why this is happen just started out of know where
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  2. #2 re: Stumped with P0300 code  
    Perma-Banned! JK LOL Explicit_Spade's Avatar
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    Have you checked or replaced your spark plugs?
    What about your o2 sensor?
    What about your injectors?

    OBD-II Trouble Code: P0300 Random/Multiple Cylinder Misfire Detected
    Quote Originally Posted by W-Body Store
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  3. #3 re: Stumped with P0300 code  
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    yep and it is pumping fuel in to the cyclered but its not running so i dont think it a injector
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  4. #4 re: Stumped with P0300 code  
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    Did you gap the plugs?
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  5. #5 re: Stumped with P0300 code  
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    yep
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  6. #6 re: Stumped with P0300 code  
    The Blue One blueguy's Avatar
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    Unplug the MAF sensor and give it a try.

    OR.

    If it is just cranking...you prolly need to have the ICM tested...because that'd be the next thing. It's what the coil packs sit on.
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  7. #7 re: Stumped with P0300 code  
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    we tested that. im going just put it in the shop
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  8. #8 Re: Stumped with P0300 code 
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    did u figuer it out i have a 2005 gtp that is doing the samething
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