2001 XJ rough idle and exhaust questions
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2001 XJ rough idle and exhaust questions
I have a 2001 xj sport utility. And my catalytic converter was stolen and I picked up a flow master cat to replace it. I did the welding my self but I'm not sure if I have an O2 sensor after the cat. They cut a lot of it out, but my jeep has no check engine light and I don't see any cut cables where an O2 sensor would go. Nor am I getting and codes at all.
Side note I'm having trouble with my xj misfiring (not sure if it's related) but I have all new spark plugs and coil packs, new 12 port fuel injectors, and my compression is good, but I'm still misfiring occasionally. And some days I have nice throttle response and high low end power. The other days the throttle response is lagging, and feel like the Jeep has lost a significant amount of power. And has a low, rough idle on start but sometimes will start perfect and sit smooth.
I have a hunch its the wiring harness for the missfire and have new fuel injector plugs just haven't had time to make a new harness
Current mods:
SYE
3" lift rough country
New more powerful battery
12 port injectors
Sparkplugs, and coils
High flow cat
Throttle body spacer
Side note I'm having trouble with my xj misfiring (not sure if it's related) but I have all new spark plugs and coil packs, new 12 port fuel injectors, and my compression is good, but I'm still misfiring occasionally. And some days I have nice throttle response and high low end power. The other days the throttle response is lagging, and feel like the Jeep has lost a significant amount of power. And has a low, rough idle on start but sometimes will start perfect and sit smooth.
I have a hunch its the wiring harness for the missfire and have new fuel injector plugs just haven't had time to make a new harness
Current mods:
SYE
3" lift rough country
New more powerful battery
12 port injectors
Sparkplugs, and coils
High flow cat
Throttle body spacer
Last edited by Edwards.anthony; 03-07-2022 at 07:22 PM. Reason: Made title longer, spelling
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