Thread: Random Misfiring P0300 Code

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  1. #1 Re: Random Misfiring P0300 Code 
    GT Level Member 99GPGTP's Avatar
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    i agree with bedwards. check the coils. get some good thick rubber cloves and pull a coil wire loose and see if ones not firing.

    also if its not a coil. check the oil and see if u have water mixing in the oil. when i bought my car it had a p0300 code and water in the oil. the lower intake gasket was blown bad causing a coolant leak and missfire. also check the fuel filter.
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  2. #2 Re: Random Misfiring P0300 Code 
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    Quote Originally Posted by 99GPGTP View Post
    i agree with bedwards. check the coils. get some good thick rubber cloves and pull a coil wire loose and see if ones not firing..
    Yeah I did that minus the gloves.. cyl 6 is definitely firing.

    I do have a coolant leak.. its not that bad though, at least not on the outside.
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  3. #3 Re: Random Misfiring P0300 Code 
    GT Level Member Madness's Avatar
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    Quote Originally Posted by spcguy88 View Post
    Yeah I did that minus the gloves.. cyl 6 is definitely firing.

    I do have a coolant leak.. its not that bad though, at least not on the outside.
    FYI, if your leaking coolant and it is not on the outside, it is probably internal and couild be mixing with oil. LIM gasket?
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