I have a 87 K5 350 5.7 TBI. I just replaced the control module and ignition coil. About a week or so later I started geting what seems to me(feels and sounds like, back fire) an out of timed engine or a fouled plug. IT is real noticable at high RPM or when I really step on it. Everyone I have asked says that I do not need to time it, that it could be a vaccum leak or that I need to replace the cap, rotor wires and plugs just to cover the ignition system. Ant suggestions would be greatly appreciated.
bax (I also just replaced the fuel filter)
bax (I also just replaced the fuel filter)
