Shudder / Misfire around 55 mph and accelerating
Well, here'* my current problem that I'm trying to track down. It started with a misfire during rainy weather. I replaced the remaining two coils on the engine as a preventative measure, since I had replaced the first one and had similar symptoms. It worked fine for a few days, then today it came back. First it started while I was crusing at around 60 and then accelerated. When I pressed the gas down started shuddering. Then eventually it started misfiring at all rpms. So I took the car home and replaced the Bosch wires and AC Delco plugs with all AC Delco parts. Engine ran great until I got up to around 55, crusing with the TCC locked up, and then pressed the gas down without unlocking the TCC. Shudder again, with the boost gauge right around zero. It shudders until the TCC unlocks, then it'* not as noticable.
Any ideas? I'll see if the Catalytic converter has rattles in it tomorrow.
1999 540iA Sport
Former 93 SSEi Owner
Former 89 SE Owner