Backfire problem...
#1
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Backfire problem...
I'm having a backfire problem in 3rd and 4th gear while full boosting only when i hit 4000rpms each time i wot. My mods are in my signature and I'm boosting 28psi. I havnt had this problem ever. My car is detuned at the moment since the meth has been disconnected. Could this be a possible boost leak or spark plug problem. Any help or suggestions would be greatly appreciated.
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#9
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How many miles on your 03?
Have you changed your plug wires? I had a similar situation, and forgot to change my plug wires at 60,000 miles. Once I changed them, problem went away.
Other than that, when you changed your plugs, did you regap them to a lower gap? This is important especially if you are running high boost.
Have you changed your plug wires? I had a similar situation, and forgot to change my plug wires at 60,000 miles. Once I changed them, problem went away.
Other than that, when you changed your plugs, did you regap them to a lower gap? This is important especially if you are running high boost.
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I jst hit 80,000 miles. I have not swaped out my wires yet that was going to be my second guess. When I put my new plugs evo8 9's i gapped them at .028 which was recommened here for high boost high horsepower evo's. I turned down the boost from 27 to 24 psi... I'll try the new wires and check my fpr. Question could I have a cut in my fuel map cause of a mishap on a tune since my car was originally running meth and no longer is now without a new tune? This problem occurs on wot at 4000rpms each time