Backfire @ 5,200 RPM's

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08-14-2005, 05:00 PM

CamaroGuy22

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Backfire @ 5,200 RPM's

My friend just bought a 94 Z28. At WOT at around 5,200 rpms the car has a back fire right before the 1-2 shift. What could be the culprit for this?

08-14-2005, 05:33 PM

Kurt Crosbie

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Re: Backfire @ 5,200 RPM's

plugs, wires, opti are all possibilities. Good place to start.

08-14-2005, 05:38 PM

CamaroGuy22

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Re: Backfire @ 5,200 RPM's

Quote:

Originally Posted by Kurt Crosbie

plugs, wires, opti are all possibilities. Good place to start.

Plugs, wire, and opti are all new. Previous owner said somebody told him it might be valvesprings? That a valve might be getting stuck open or something?

08-15-2005, 11:43 AM

Kurt Crosbie

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Re: Backfire @ 5,200 RPM's

That is also possible. Might want to take your valve covers off at least look at your valve springs. I did that one time and found two broken valve springs on the driver's side. Luckily, the valves had not yet dropped.