Thread: Code P0300 , mutiple random missfires, no fix yet

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offroadfury6 Code P0300 , mutiple random... 04-05-2011, 04:12 PM
michaelbm Re: Code P0300 , mutiple... 04-05-2011, 10:07 PM
offroadfury6 Re: Code P0300 , mutiple... 04-05-2011, 11:43 PM
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offroadfury6 Re: Code P0300 , mutiple... 04-06-2011, 08:33 AM
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offroadfury6 Re: Code P0300 , mutiple... 04-09-2011, 03:12 AM
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  1. #1 Code P0300 , mutiple random missfires, no fix yet 
    GXP Level Member offroadfury6's Avatar
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    ok I'm getting a code P0300 which is mutiple random missfire. well it's still missfiring and heres what i've done so far.

    -Checked for vaccum leaks
    -changed CPS (crankshaft position sensor )
    -new wires
    -new plugs
    -cleaned intake filter
    -cleaned butterfly behind the MAF
    -new coil packs
    -had the Ignition Control Module tested (GOOD)
    -I've ran 2 bottles of seafoam, 1 bottle of lucas fuel injector cleaner in the past 6 fillups...( I always run 89 or 93 fuel )
    -New Cat converter ( after my old one shredded which is probably due to overheating ( hince, missfiring ) )

    I have no idea what to do next, any suggestions? does an '06 grand prix even have a Camshaft sensor??
    Last edited by offroadfury6; 04-05-2011 at 11:41 PM.
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