hatch4x4 Posted December 17, 2005 Share Posted December 17, 2005 My buddy has a 99 or 00 RS. Previous owner put an aftermarket intake on. The PCV system has also been mucked with. However, he is all of a sudden hearing backfiring when he accelerates, from what sounds like through the intake. CEL is on, gonna get that checked out. I offered to look before he drives it any more, what should I look for? I'm thinking ignition system, specifically his spark plugs and wires. Quote Link to comment Share on other sites More sharing options...
Subie Gal Posted December 17, 2005 Share Posted December 17, 2005 coil plugs wires intake 02 sensor any idea what intake he's got? get a photo if you can Jamie Quote Link to comment Share on other sites More sharing options...
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