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cutebikerboy3
Posts: 34
Joined: Sun Nov 04, 2007 6:10 am
Car: 1990 nissan 240sx coupe

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I own a 1990 nissan 240sx coupe. It has 170,000 miles. I just recently did the spark plugs wires and oil change. I am having a problem with it backfiring when I shift or let off the gas pedal. could anyone tell me what could be the cause. I have been told it could bee the mafs or the tps.

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a31nismo
Posts: 13
Joined: Tue Apr 28, 2009 3:09 pm
Car: rb20det a31

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maybe exhaust leak
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cutebikerboy3
Posts: 34
Joined: Sun Nov 04, 2007 6:10 am
Car: 1990 nissan 240sx coupe

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idk.........it does it more when the car is warmed up. like when i drive for a long period of time.
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