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Yes it's a 2001 with the cats built into the exhaust.
No plug wires. The coil sits on the plugs on the 2001.
I replaced the O2 sensors. That seems to have cleared that fault, but it is still misfiring cylinder 2. And it gave me a "System Too Rich" fault on Bank 1 and 2 (codes P0172 and P0175).
The exhaust sounds louder than normal as well.
I'm ready to nuke this thing.
Did you get OEM style 4 wire O2 sensors? O2 wire cheap universals?
Running too rich may mean the O2 sensor system is not working yet (fuse? voltage at the pre cat O2 sensors, should be about 13 DC volts on one and about 0-5 volts, AC on the other) and 2 ground wires back to the PCM/battery ground network? Check all four wires with a volt meter, there should be no voltage (Less than about .01 V) on the ground wires to the engine/battery ground.
Could be a stuck or sticking open injectors.
Could also be the notorious 2001 bad head casting leaking.... That is why the old spark plug color and contamination would have been important to save, photograph.
Is the air filter OK? OBD-II sights say a dirty Mass air flow sensor might do this, but the Jeep version is MAP sensor not an MAF and other than a bad vacuum line under it to the throttle body they are pretty much bomb proof.
02 sensor wiring damage is very common jeeps!!!!
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