engine misfire ?
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Launching!
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engine misfire ?
I have been troubleshooting a miss for several months now. I have changed the coils, plugs, wires, checked the fuel pressure and compression. Everything checks ok but it still misfires. Only time it doesn't do it ( that I can tell ) is at full throttle. It only does it at idle and cruising speeds. I have also changed the tune numerous times. It is driving me crazy. Anyone run across this problem?
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Originally Posted by BlownChevy
Have you run a scan to see wht Cyl it is on....could be a valve or a bad spring.
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Originally Posted by Juggernaut
How long has it been doing it? Before the tune or after? Dyno tune?
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Originally Posted by Juggernaut
What are your plugs gapped at?
The problem I got when I first put on the turbo was it would shudder a little when excellerating and when you were off the gas it would buck. The problem as progressively gotten worse. I have always had a vibration that would come and go when cruising the interstate. I believe when I put the turbo on it just made it worse and more noticeable. It has a new trans, eaton posi and converter. So I know its none of those.
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I had the same problem after my whipple install. Allen Nelson swapped my '00 PCM for an '02 PCM. All the prolems went away. I know some others have made the same swap and rave about the results.