P0300 misfire help (fixed) - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 10-19-2011, 03:02 PM   #11
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yes.. It was done when the PCM was replaced. I havent done many is it possible that doing it again could solve the problem? Any Idea what bypass deviation or reference pip is? Thats what the ICM I took off failed
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Old 10-19-2011, 03:07 PM   #12
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I believe the reference is the signal from the crank sensor. If the CASE is off it will effect timing, and can cause a misfire by not sending the spark at the right time.
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Old 10-20-2011, 01:50 PM   #13
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So after two bad Ignition control modules from the local pull apart I was able to get my hands on a new one. I Also used some electrical parts cleaner to spray out the connector. Just for *&G did a case learn again also and random misfire is solved. No more p0300 and not one misfire on 3 or 6 Thank you for the help new forum to add to favorites and daily brosing list
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Old 10-20-2011, 02:04 PM   #14
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Great news. I will mark as fixed.
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