hey guys, just picked up an 86 gt. When its warm it doesnt like to start unless you have it at 1/2 to 3/4 throttle. Once it starts it surges at idle, and while driving and comming to a stop it wants to stall. Think its either TPS or IAC? The kid I bought it from said he cleaned the IAC and it ran better..but he never replaced it. Any ideas?