Getting on the interstate today the heep just nosed over. Runs really rough, and at idle seems to have very high exhaust pressure at the tailpipe, as compared to my wifes XJ. Injectors checked out OK, and I replaced the plugs, cap rotor and plug wires. 98 TJ, 125,000 miles.
So, the question is: what are the symptoms of a bad catylic convertor?
The search yielded some info that essentially indicates they don't fail