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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Getting occasional backfiring...

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Old Feb 20, 2010 | 08:51 AM
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Default Getting occasional backfiring...
Ok usually when I hit the gas hard in idle or if Im on the freeway and let off the gas I get a loud backfire. Not sure what the cause is. I did recently get LT headers put on so Im wondering if I may need a tune? ALso deleted the EGR and AIR. Plugs and Wire have less than 1000 miles on them...
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Old Feb 20, 2010 | 08:59 AM
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its unburned gas in the pipes. running rich because of the lts it will prolly fix itself keep driving it
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Old Feb 20, 2010 | 09:21 AM
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Originally Posted by draggin97s10
its unburned gas in the pipes. running rich because of the lts it will prolly fix itself keep driving it
Even after about 2 weeks now?
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Old Feb 20, 2010 | 09:44 AM
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**** shouldnt be. codes?
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Old Feb 20, 2010 | 09:52 AM
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No I don't have any codes. Haven't taking it to a shop yet for a diagnostic. It ran fine before the headers now its runs somewhat rough and backfires.
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Old Feb 20, 2010 | 09:54 AM
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how did you extend the o2s
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Old Feb 20, 2010 | 10:03 AM
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I had the same problem with my LT car after full exhaust. never could find the problem. mine backfied all the time. i changed plugs and wires and rerouted my wires so there were away from the headers and it hasnt done it since. I think the heat broke down my wires really fast.

Id say a tune wouldnt hurt but my suggestion is to check your wires.
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Old Feb 20, 2010 | 10:07 AM
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tune will never hurt
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Old Feb 20, 2010 | 10:58 AM
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Originally Posted by draggin97s10
how did you extend the o2s
I bought o2 extensions for the front.

Originally Posted by NAVY99B4C
I had the same problem with my LT car after full exhaust. never could find the problem. mine backfied all the time. i changed plugs and wires and rerouted my wires so there were away from the headers and it hasnt done it since. I think the heat broke down my wires really fast.

Id say a tune wouldnt hurt but my suggestion is to check your wires.
Yea I think thats a good idea. My wires are not touching but they are pretty close to the headers. I also think a tune would help as well...
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Old Feb 21, 2010 | 06:52 PM
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id try that. o2 extensions bought are good deal. alot easier then extending the harness.
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