[Atl XJ]

Originally Posted by stevenaa

Might also be an inaccurate Temp. gauge. My 91 reads 20 degrees to high. I plumbed in gauge and mounted so it hangs down to the right of the steering wheel next to the console.

Mine was the same way. I replaced almost the entire cooling system before I realized it was the stupid gauge.

I'm not retarded, the sending unit was one of the first things I replaced.

[Atl XJ]

Originally Posted by Kuasimodem

We-e-e-l-l-l-l, a partially clogged cat will create too much backpressure and will cause the engine to run hotter than normal. Voice of experience here, I had an 86 Mustang with a V-6 that started running very hot, then it started running really bad, no power. After removing what was left of the cat's internals, the overheat and power loss problems disappeared.

Yeah, gutting the cat is always the best bet. Who cares about the environment or emmissons tesing.

[Kuasimodem]

Originally Posted by Atl XJ

Yeah, gutting the cat is always the best bet. Who cares about the environment or emmissons tesing.

I was 22 young and dumb. I have since learned the error of my ways and put a new cat on when I do exhaust work. When I bought my 88 XJ it had no exhaust on it and received a brand new factory type exhaust from manifold to rear bumper. In a couple months my 92 will be getting the same treatment to replace the rusty setup that's on there now.

BTW - Wisconsin doesn't have emission testing, but the Jeep was designed to run with a cat so one will go on.