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

Backfire in intake.....WHY?

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Old 11-13-2004, 09:13 PM
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Backfire in intake.....WHY?

Sometimes while im driving at around 30 and I hit the gas.....there is a backfire in the intake and I have no idea why. I dont know if it happens just around 30mph, I doubt it, but thats just how fast I seem to be goin everytime it happens....Anyone have any idea why?
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Old 11-13-2004, 09:30 PM
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Re: Backfire in intake.....WHY?

check your wires/plugs also are you doimg it at a low rpm launch or getting on it..
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Old 11-14-2004, 12:51 AM
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Re: Backfire in intake.....WHY?

Its a momentary leakout condition, to start check;

a faulty injector(s), leaking intake bellow, faulty fuel pump, plugged fuel filter, faulty/worn TPS. Also run some good injector cleaner through it.

Last edited by 94Zman; 11-14-2004 at 03:08 PM.
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Old 11-14-2004, 01:59 AM
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Re: Backfire in intake.....WHY?

Could be an exhaust valve cam lobe that is worn out and flat???
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