[JimCRX]

Yeah, check the timing if you can first. If it's good, run some fuel cleaner. BTW, is your cat. converter hollowed out or aftermarket? That could be the problems if it is. If not then, has you headgasket even blown before or have you ever burn antifreeze up? Cause sometimes anti-freeze clogs the cat. converter, like mine so I had to hollow it out.