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

lt1 surging at idle????

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Old Aug 22, 2009 | 10:27 PM
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Default lt1 surging at idle????

my 95 z28 started to surge at idle after a recent tune up, and recently it started to hesitate and backfire at WOT (every once and a while)

can it be o2 sensors?

let me know what you think

mods in sig (stock)
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Old Aug 22, 2009 | 10:28 PM
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is it throwing codes?
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Old Aug 22, 2009 | 10:31 PM
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no not consistently
it pops on and off
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Old Aug 22, 2009 | 10:33 PM
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if its flashing that means its an isolated misfire, if its constant it could be anything
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Old Aug 22, 2009 | 10:37 PM
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it did have an intermittent o2 problem a while back and i never changed the o2's but can they cause it to surge if its telling it to leaning out or making it rich
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Old Aug 23, 2009 | 06:27 PM
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anyone else have any ideas??
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Old Aug 26, 2009 | 03:26 PM
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Did you take the intake bellow off? If so when you put it back on the bottom lip of the rubber probably rolled under and it's allowing unmetered air into the intake. At least that's what I have seen and had happen...
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