loud tailpipe backfire
06-20-06, 09:55 PM
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loud tailpipe backfire
i have a 1990 rx7 that i just bought...it has a rebuilt engine, with an upgraded turbo, intercooler, blowoff valve, stage 2 clutch, and probly other stuff i don't even know about...it runs good most of the time but when i shift it makes a loud backfire and a flame shoots out the tailpipe, also...sometimes when i try to speed up fast it chokes. i don't know what it is...i don't know if it is helpful but it also has the power steering pump taken out since i've bought it and it has an apexi super air flow converter. someone help.
06-20-06, 11:48 PM
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yeah mine does that too....like when I floor it....sometimes it hesitates i guess...it makes this weird jerking when I step on the gas, what is that? throttle cable maybe?
06-20-06, 11:51 PM
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Probably a grounding issue... When you floor it the 2ndary injectors kick in, they are opened and closed by the ECU gounding out the circut at blinding speed.. If the main ECU ground is not good then the Injectors do not transition smoothly creating a hesitation.
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