[Nixon1]

Hmm...ok, so I hear 'doof' sounds, like swooshes of air, coming from my pipes during deceleration, but they're sometimes there during idle too... Misfires pretty bad when I step on it. Today I had the car in Park and held the pedal at 2000 rpms steady and it backfired every few seconds constantly. I hear that ticking noise..it's not too loud but it's there. I seem to be breathing quite a bit of gas fumes from in the cabin.... That sound like an exhaust leak at the headers to you? Sounds like one to me....dunno any other ways to check though. Don't have an engine stethoscope or anything..just gonna plug a small vacuum leak and check/adjust the timing tonight..I'll let you know if these things fix anything.