I have a 2002 grand prix se with 3.1l. I staright piped it and it doesnt sound bad untill i let off the throttle and the exhaust popes and it sound like a back fire almost. what causes this?
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I have a 2002 grand prix se with 3.1l. I staright piped it and it doesnt sound bad untill i let off the throttle and the exhaust popes and it sound like a back fire almost. what causes this?
A 3.1 straight piped causes it.
I'm gunna guess it's due to the fact that there isn't enough output in the engine to sustain the low back pressure of a straight pipe..
But i bet someone will correct me![]()
Well its straight piped with no resonator or mufflers. So you are going to hear the "back fires" and popping sounds as you let off the gas.
Install a resonator and most of the sound will go away.
A backfire is caused by un-burnt fuel...and with nothing in its path restricting it...yeahhhh.
Resonator will help it but might not fix it all.
You guys are dumb.
Another thing to note.
3100 = 60*
3800 = 90*
We got bent.
60* exhaust note is way better.
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