Can't post in the bay area forum, since i'm a newb. But i think my sons car has a bad cylinder 4.. I've swapped plugs, injectors, coils and the misfire is still there and happens at idle. Trying to get it smogged, but can't with the check engine light on now.
I don't know much about these motors, so just looking to find someone reasonable to do a deeper dive and see if it's a ringland or maybe just a vacuum leak I'm not finding (wishful thinking).