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LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Backfire

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Old 03-16-2004, 11:13 AM
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Backfire
It backfires when i rev when the motor is still kinda cold. Is this a sign of running rich?
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Old 03-16-2004, 11:18 AM
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What are signs of running rich?
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Old 03-16-2004, 12:04 PM
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If the air pump solenoid hasn't turned on yet (it doesn't until the car is warm) you may get a slight backfire due the fuel mixture being rich. I noticed that with mine until I heard the air pump turn on.

My .02 cents.....
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Old 03-16-2004, 12:49 PM
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Is it backfiring or is it just popping from the exhaust?
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