sputter / backfire (e85 evo)
May 25, 2009, 05:15 PM
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sputter / backfire (e85 evo)
I'm getting a sputtering / backfire at full boost (30 psi). This started happening after about 5 runs down the track. My last run I parked the car and everything was fine. It sat for about an hour. Then on my way home the issue started. Its not throwing any codes. Car is e85 tuned. I already checked the plugs and they look fine. Thoughts?
May 25, 2009, 11:36 PM
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+2 what selp said. As long as you are sure your timing is good and you don't have anything too crazy, it is probably just plugs and needing a smaller gap. Try em at .20
May 26, 2009, 06:33 AM
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I'm currently running the NGK BPR8ES gapped at 0.020” When I pulled them they didn't look bad, I'll pick up a new set today and see how it goes.
Thanks guys.
May 26, 2009, 03:29 PM
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UPDATE: Put some new bpr8es in and its running perfect. thanks for the responses guys, much appreciated.
The real question is, what made these plugs fail in about a month?
The real question is, what made these plugs fail in about a month?
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Aug 2, 2009, 05:43 PM
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Been having the same problem, going through new plugs about every ~1500 miles on my fp red at 32 psi. What about E85 makes me go through plugs so damn fast?
Aug 2, 2009, 06:00 PM
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im running e85 as well(35r at 34psi), i dont go through plugs nearly as fast as i do on pump gas, but im running pretty rich on pump gas.
anyway, i was breaking up really bad through fourth gear pulls on ethanol about a month ago, i had checked the plugs and they didnt seem bad, but thats only because they dont accumulate soot and carbon which is what i was used to looking for.
changed the plugs and i was fine. im using a cop set up so i dont need to gap the plugs down, but plugs do need changed rather frequently.
anyway, i was breaking up really bad through fourth gear pulls on ethanol about a month ago, i had checked the plugs and they didnt seem bad, but thats only because they dont accumulate soot and carbon which is what i was used to looking for.
changed the plugs and i was fine. im using a cop set up so i dont need to gap the plugs down, but plugs do need changed rather frequently.
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