1994 Pontiac Grand Am loud poping backfire from throttle bo

1994 PONTIAC GRAND AM
194,000 MILES • 6 CYL • FWD • AUTOMATIC
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[email protected]
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I just replaced my fuel injectors with acel 19lbs fuel injectors eveything was fine for 2 weeks now when i punch the gas there is a loud poping backfire coming from throttle body and loss of power.
I have replaced;
plugs,wires msd coils,map sensor cam pos sensor,02 sensor new fuel pump,fuel filter,cold air intake,throttle pos sensor. I need help!
Aug 4, 2010 at 10:05 AM
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JACOBANDNICKOLAS
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Has the check engine light come on? Is that the actual mileage on the engine (possible bad intake valve)? Have you checked fuel pressure and regulator?
Aug 4, 2010 at 6:53 PM
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[email protected]
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No, the check engine light is not on? I havent replaced the fuel pressure regulator but have replaced all other fuel components, I guess my question is it ok to install 19lbs injectors when stock run 17lbs do I need to upgrade anything,like I said there is only loss of power when I step on the gas. Thank you for your help it means a lot I have spent 2000 so far and still have issues im at a loss.
Aug 5, 2010 at 1:43 AM
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JACOBANDNICKOLAS
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It isn't a good idea to change the injectors. They should stay OEM pressure. If you have already changed them, that is most likely the problem. My god, you spent a lot. The truck I drive to work everyday only was 60 dollars and that was with a full tank of gas. (LOL) It needed the frame repaired. 20 minutes and that was done. Let me know if you have other questions.
Aug 5, 2010 at 11:11 PM