Bstd_02_Wgn
NAXJA Forum User
- Location
- Great North Woods, NH
So I have been chasing this for a while with no luck...hoping maybe someone has been a similar problem and can give some new direction.
2000 Cherokee Sport, AW4, 231tc, 140,000 miles, Cali emissions vehicle.
You can drive the XJ all day with no problem, but when you get the motor hot to operating temp and then shut it down, it will idle rough upon startup if you try to restart within 10 minutes. If you open the hood, this does not happen: It will run fine as if nothing it wrong.
When the rough idle starts, if you gas the jeep to 2500rpms+ and hold it, it will clean out and run fine after a couple seconds. If you let the rough idle continue, it will flash the "Catastrophic Catalytic Converter Failure" code and then throw a couple misfire codes.
I have replaced the O2 sensors (w/ cali ones), the CPS, the entire front section of exhaust from the manifold to the tailpipe, the plugs have been changed, air filter is clean, and the coil pack has been replaced. Not entirely sure where to go from here.
Maybe I am missing something simple, or maybe not...any ideas?
2000 Cherokee Sport, AW4, 231tc, 140,000 miles, Cali emissions vehicle.
You can drive the XJ all day with no problem, but when you get the motor hot to operating temp and then shut it down, it will idle rough upon startup if you try to restart within 10 minutes. If you open the hood, this does not happen: It will run fine as if nothing it wrong.
When the rough idle starts, if you gas the jeep to 2500rpms+ and hold it, it will clean out and run fine after a couple seconds. If you let the rough idle continue, it will flash the "Catastrophic Catalytic Converter Failure" code and then throw a couple misfire codes.
I have replaced the O2 sensors (w/ cali ones), the CPS, the entire front section of exhaust from the manifold to the tailpipe, the plugs have been changed, air filter is clean, and the coil pack has been replaced. Not entirely sure where to go from here.
Maybe I am missing something simple, or maybe not...any ideas?