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Backfiring

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Old Jul 5, 2006 | 10:01 PM
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98WhiteDevil's Avatar
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Default Backfiring

I'm running speed density with the mods in my signiture. I've been tuning my car with EFILive for about 5 weeks and I had it running really good. Then about a week ago my car started backfiring under load and it will backfire while idling also. I did some scanning and the only thing that I could find was that it was knocking when backfiring, but that's expected. The wideband is showing that the A/F seems to be in line, so I'm kinda stuck at where to look now. Anybody know what's going on here, or have a suggestion?
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Old Jul 5, 2006 | 10:06 PM
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do you notice any other oddities? such as timing dropping out heavily
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Old Jul 10, 2006 | 11:10 AM
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I found the problem, a cracked spark plug.
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Old Jul 10, 2006 | 09:17 PM
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bulletLS1's Avatar
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SORRY TO STEAL YOUR THREAD!!!! 98whitedevil
I sent to eat s#it to hptuners... so my next step will be to buy EFIlive, any directions in a very novice in EFI,
thanks!!!!

camaro 98 M6
ls6 short block
219-227 116lsa lunati cam
cnc stage II heads,
a few other "thingies"!
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Old Jul 10, 2006 | 09:20 PM
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I just started using EFILive about a month and a half ago. It took me a couple of hours and I had the program down pretty good. All the tutorials on here and EFIForums helped a lot. Overall I though it was really easy to get my car running pretty good, especially now that I fixed a cracked spark plug that I didn't know I had.
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