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

Backfire with quick throttle burst?

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Old 01-29-2007, 05:47 PM
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Default Backfire with quick throttle burst?

I've had this since I bought the car. Only happens when moving in gear, never in nuetral or park.

Every once in awhile, I get a backfire when I give a quick part throttle burst or two. I don't think it's ever happened when I went WOT.

Could it have something to do with the burst knock retard programmed into the CPU?
Old 01-29-2007, 05:50 PM
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I had the same problem...but it was only when I shift down to first and stood on it..it wounld backfire badly. I recomend you change your coil...thats what I did, and problem solved.
Old 01-29-2007, 08:44 PM
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Good deal. It's cheap enough. Ordering the MSD unit now.
Old 01-30-2007, 12:14 AM
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Is that a backfire from the exhaust or from up front from the intake? Mine backfires from the air intake sometimes when I give it quick part throttle. I have'nt figured out why yet and there is no hole in the elbow.
Old 01-30-2007, 12:58 AM
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check your O2's if your cars lean on a bank and you blip the throttle my tuner told me it will do that because the computer cant add fuel fast enough or some stupid **** like that but i'd trust the guy he tunes thousands of these cars every year


Also checked timing ever although it should run like crap all the time check your opti connector (clean it)

whenever you come off throttle on these cars your really not suppose to pull your foot off all the way (i still do) because the TB closes and doesnt let enough air in for a sec and the car will pop sometimes there
Old 04-27-2007, 04:45 PM
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did you guys fix your problem?
My car backfires thru the intake when i quickly hit the gas but only at lower rpms less than 2000. All normal stuff is fixed or triple checked.
Old 04-27-2007, 04:55 PM
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my car used to do it but since i have done plugs wires coil oxygen sensors and a tune from madz28 it hasn't done it yet



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