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Discussion Starter #1
Please help I?ve done everything to chase down this code ? misfire number7cyl? and it runs fine and only comes on during cold start in the morning. I found a bunch of forum write ups that say this is a known problem on cold start, and I don?t know a fix. I talked to my tuner and there?s nothing he can do, I have a cold air and long tube headers cat less mid pipe. Light comes on and stay on all day, but if I clear it when engine is warm you can run it all day without a light, then a light first time the next morning when it?s cold.
 

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What motor is this. Might be a intake gasket leak


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Discussion Starter #3
It?s a 392, but I can run it all day after cold start and I clear the codes and no problems. I changed coil, plugs and looked everywhere there is no problems and it runs great. I?ve read there was a TSB for this problem but the dealer will not fix this. Has anyone experienced this or know someone who has, I?ve switched over to a diablo tune to see if this will correct the light.
 
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