What are the symptoms of a plugged cat converter ? I've recently lost much power and the engine is running way too hot , though radiator and oil are full .

Those are the symptoms! It will also smell like it is running rich. I picked up a new "convertor" for my CJ when installing the exhaust. It cost me $4 at NAPA (a 24" piece of 2" od pipe) That beat the heck out of a $100 convertor, and since we don't have smog tests in MN anymore...I get away with it. Good luck!

Mike H.
1983 CJ-7 Laredo, IT'S ALIVE!

Symptoms:

1. Rattle in the Cat.
2. Hot Eninge.
3. Exhaust manifold glowing dull to cherry red (Lift the hood at night).
4. Progressive loss of power, especially at higher RPM's and on hills.
5. Little exhaust pressure out the tailpipe.

Confirmaiton:

1. With the engine COLD, remove the O2 sensor.
2. Drive it to see if the power was resotred.

Pulling the 02 sensor will remove all backpressure built up by the clogged exaust and resore power. If power isn't restored... the problems' somewhere else.

true it sounds like a clogged cat, also ive noticed a blowing sound kinda like if you pucker your lips and blow real hard, try driving like up a mountain next to a guard rail or retaining wall the sound will reverberate off the wall and you can hear it real well, another way to tell is if your vehicle warms up real quick like in the morning my truck would get to 210 in just a couple of minutes of driving where normally it would take alot longer soggysod


if it aint broke, break it so you can learn to fix it

It probably idles great and runs like it's tied to a building also.

JpShp
http://www.jeep-shop.com

Well all the diagnostics nailed my problem down for me, as I was about to ask the same thing. So, next question, for those of us that have to run cats, can anyone give me a link or recommendation on a high performance (flow) cat and about what they cost?

Thanks

BentMetal

83CJ7 still limping along but getting better daily.

Flowmaster just came out with some of them and they are moderatly priced. Go here

JpShp
http://www.jeep-shop.com

I THINK MY CATS GOING BAD TO IT HESITATES AND STUMBLES WHEN I GET ON THE GAS LIGHTLY AND HARD AND THE EXHAUST MANIFOLD IS GLOWING RED WHAN I POP THE HOOD. AND THE OIL SMELLS LIKE GAS ALOT WHAT DO YOU GUYS THINK???????????????