i just bought a 87 iroc with 35tpi i changed plugs wires cap and rotor also tps and iac the car surges at idle not alot but enough to notice also idles normal when i first start the car then higher after a few minutes of driving but if i put my defroster on it will go down for some reason also the car feels like it has no power sometimes also the comp keeps throwing the code that tps voltage is too low and after i clear it comes back instantly before i even start the car. one more thing today on the lie i put my blinker on and the car died for like half a secong and the rpm guage went to 7000 and stayed tthere but i was on cruise at like 2500 please some one give me some advise