thanksforyallshelp
New member
I’m getting a p0420 and the ignition coil pack keeps dying out with a misfire cylinder 1 I replaced the cat, both 02 sensors and the coil pack and plugs twice same issue persisted about a week later car won’t start coil pack bad p0420 misfire cylinder 1. Replaced the flex pipe still replaced the wiring harness still happening. Could it be a clogged fuel injector? Also car has code 52 needs timing belt replaced. Don’t know if this has anything to do with the issue. I don’t have any vacuum leaks that I can see I put a smoke machine on the air intake and muffler got nothing