backfiring

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Sr20detNESS
Posts: 82
Joined: Mon Aug 01, 2005 3:26 am
Car: '92 240sx fastback redtop sr20det

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i have a s13 sr20det redtop and i got quite a bit of backfiring. when i drive at a constant 2000-2500rpm i get a quite yet consistent backfiring and my car seems stubborn to accelerate. i have a walbro 255lph fuel pump and smic but a factory dsm 1st generation bov any suggestions

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Sr20detNESS
Posts: 82
Joined: Mon Aug 01, 2005 3:26 am
Car: '92 240sx fastback redtop sr20det

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and also is backfiring bad for the motor
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PROJECTRB240SX
Posts: 3673
Joined: Fri Jun 13, 2003 5:33 pm
Car: 1972 DATSUN 240Z W/ SR20DET

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BACKFIRING IS A LOOSE TERM...

IT CAN MEAN ITS RUNNING RICH OR HAS AN IGNITION SYSTEM PROBLEM. A SIGN OF THIS WOULD BE FLAMES IN THE EXHAUST.

IT CAN ALSO MEAN THAT THE CAR IS RUNNING LEAN WHICH WILL MAKE A POPPING NOISE IN THE EXHAUST WHICH IS REALLY BAD.

I WOULD CHECK YOUR PLUGS/GAPPING, CHECK YOUR TIMING, AND ALSO CHECK FOR INTAKE LEAKS. IF THAT DOESN'T SOLVE IT CHECK TO SEE IF ITS RUNNING LEAN. ALSO CHECK YOU MAF TO SEE IF ITS NOT GIVING THE RIGHT VOLTAGE.
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