From: (rwynkoop at i1.net) >I think my catalytic converter has crapped out on me! Once the engine >warms up I get no powerand had to coast home from work today. I hear a >loud hissing noise coming from the converter. I just had new mufflers and >tailpipes put on last year. I just put a new cerb on this weekend. Has >anyone else had their converter go bad?? Stock L69, 97,000 miles, new >plugs, new coil, cap, rotor, plug wires. Sounds like a converter problem. Your carb may be running too rich and caused the cat to plug (or it was on its way out already.) If you car is computer controlled you can find out what the computer is trying to do the mixture by hooking a 6cy dwell meter up to a green pigtail connection just in front of the carb. If the idle bleed screws are adjusted ok you should get a 30 deg reading. If this value is lower then it means your carb is lean. If this value is high (50-60 deg) then your carb is running rich.