PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Multiple Random Missfire

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Old Aug 16, 2013 | 11:03 PM
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Default Multiple Random Missfire

I keep getting a multiple random misfire code. I can clear the code and run it all night at the track but as soon as I try driving around town its back. I've changed plugs, wires, and checked the coils. I'm not sure what else to look at.

My car is head, cammed, intake, and everything else needed to support those mods.

Has anyone else had this problem?
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Old Aug 17, 2013 | 09:08 AM
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When it was tuned did they adjust the miss fire tables?
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Old Aug 18, 2013 | 08:17 PM
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I imagine so. I've had it dyno tuned and street tuned by the same guy. I've had it retuned probably 4-5 times and it continues to do it. I'm pretty certain it's something that needs to be adjusted in the tune but after multiple attempts it hasn't done any good.
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Old Aug 20, 2013 | 10:08 PM
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up top
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Old Aug 20, 2013 | 10:22 PM
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i had the same issue and it turned out to be my injector seals.

i changed everything, had the timing relearn and everything.

turned out to be my injector seals, take a look at those
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Old Aug 20, 2013 | 10:23 PM
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Not much anyone can do without seeing your tune. Its either in the tune or your have a real missfire.
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