My 2003 Jeep wrangler can't be driven more than 25 miles because it starts having problems as soon as it warms. It looks like the engine loose compression and I have to wait for the engine to get cooler so I can run the jeep again. I have been told that can be the Oxigen Sensor or the Catalytic Converter. When this happens there is like a sulfur smell. I took it to a muffler shop and I was told that if the malfunction only happens when the engine is warm and not when the engine is cold it is not a catalytic problem is that right?? (There is no check engine lights on)
Also last year when I took it to get the inspection sticker the oxigen sensor came on the computer to be replaced it but I didn't,,,, This year that oxigen sensor problem did not coame out on the inspection sticker procedure
Please suggest any solution.