car is backfiring at like 6000 rpms... but not always
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Joined: Dec 2000
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From: Islip, CA, USA
car is backfiring at like 6000 rpms... but not always
i dont know what the deal is.
running:
12:1 fmu, stock injectors, inline pump, walbro 255.
@ 9psi, at about 6000 rpms, it back fires sometimes in 3rd or 4th gear... i have no clue why. Its usually only when i downshift it and punch it on the freeway.
Take care
-sam
running:
12:1 fmu, stock injectors, inline pump, walbro 255.
@ 9psi, at about 6000 rpms, it back fires sometimes in 3rd or 4th gear... i have no clue why. Its usually only when i downshift it and punch it on the freeway.
Take care
-sam
Thread Starter
Member
Joined: Dec 2000
Posts: 4,848
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From: Islip, CA, USA
Re: car is backfiring at like 6000 rpms... but not always (94goldjungsr)
i also do not believe my o2 sensor is working properly... the backfiring is kind of a hesitation / backfiring deal its weird.
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Joined: Sep 2001
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From: Bradenton, FL, US of A
Re: car is backfiring at like 6000 rpms... but not always (94goldjungsr)
Too much fuel.
You are running too rich and the excess fuel is igniting in the exhaust manifold. Try a 10:1 FMU.
Randy
You are running too rich and the excess fuel is igniting in the exhaust manifold. Try a 10:1 FMU.
Randy
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