i just picked up an 88 hf for $100 off some guy that needed cash.it is ok condition but it came with some kind of header, a pacesetter exhaust, and some 5 star american racing rims that wouldn t look half bad painted black. the only thing it needed was an alternater. i have been driving it for a while now and i am starting to notice some hesitation at around 1500-2500 rpm's. pretty much when ever i hold at a constant speed. Any one had this problem?? i have replaced the plugs, wires, cap&button, fuel filter, and air filter. im thinking maybe the 0-2 senser or maybe even the ECU. if any one has any solutions i would appreciate it.