I finally got my 84 380Se running with the install of a new cap. It doesnt run very well at all! Below 2000rpm it shakes and bucks and will stall at idle. Over 2000 rpm it seems to smooth out, but doesnt seem to run strong. Here is the strange part. After 15 min of running the exhaust pipe after the cat convertor was glowing red for 2-3 feet!! BRIGHT RED! What can this be caused from? The original problem happened at highway speed and the car just died. I couldnt get it going until I replaced the cap.
Any ideas??