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back fires and sounds like a gun?

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Old 05-06-10, 11:48 AM
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TX back fires and sounds like a gun?
Aight i have an 88 t2 large streetport, walbro 255 three inch intake and exhaust, emmisions removed, no secondary butter flys, comp is 115 front and back. And my problem is when its under load and i hit about 4500 to 5000 in the rpms it cuts out an and back fires and aounds like a freakin gun my afm is reading .281 ohms resistance and the tps is .983 ohms at close and really bounch all the way open anyone have any ideas.
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Old 05-06-10, 03:00 PM
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The waiting game......

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what injectors are you running? stock ecu?
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Old 05-06-10, 03:30 PM
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Stock injectors and ecu
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Old 05-06-10, 03:54 PM
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fuel cut???
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Old 05-06-10, 03:57 PM
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FFFFFFFFFFFUUUUUUUUUUUUUU

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Originally Posted by hiroichi1515
fuel cut???
^^ this.

do you have an FCD?
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Old 05-06-10, 04:34 PM
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Street port + Intake + exhaust = much higher than stock boost. If you don't have an fcd that is most likely your problem.
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Old 05-06-10, 05:54 PM
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I dont have a fcd and no boost controler
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Old 05-06-10, 06:47 PM
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I forgot to add as well when it does it, it spikes up and then it holds at 5psi and it wont move from there
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