i have a 94 gsr with catback, header and testpipe...anyway after the engine has cooled completely, after restarting and traveling down my block accelerating slowly, i get an odd hesitation at around 2500 or 3000 rpms while accelerating...if i hit the gas pedal a little harder it will move on and accelerate normally and after that initial 'hiccup' it runs fine..as to describe the hesitation: it seems as tho the car is backfiring rapidly and my bro says that it sounds like a rev limiter as i go down the block...i really dunno where to start, i get a check engine light occasionally but not all the time...any opinions or help would be greatly appreciated...thanx in advance