Mechanic called. He unbolted the pipe between the engine and the catalytic converter. The engine runs beautifully. So, I guess it's the converter.
Is there any chance that a muffler can be bad and cause that much restriction? I know it has had more exhaust noise, but I've never heard of a muffler causing that much restriction.
Any advise? I checked online...cheapest converter I could find for the 92 was $400. Guess I'll order one tomorrow...
88 BMW E32 735i (make it go away)
95 Volvo 960 "Inga" (valve problems)
95 Nissan Maxima (the indestructible)
89 Ford Ranger XLT (ugliest truck in the South)