hey everyone, still having trouble with my mother's XJ. will try to explain as best as i can on what is happening, as i am confused.
i have been chasing this problem for a month now and am readyy to pull my hair out.
vehicle is a 2000 4.0 with around 215k
a couple weeks ago she tried to start her jeep and it wouldnt run at idle, or would run at a very low idle. i messed around a bit and found a corroded positive battery terminal, i cleaned it all up put it all back together and jeep ran perfect. 2 days later, same issue. i followed the positive cable to the fuse block on the firewall, found it corroded as well, cleaned that terminal, ran fine for 3 days, same problem.
the alternator on the vehicle i replaced a couple years ago, found i accidently put it in my scrap barrel, it had been underwater for months and was rusted all to hell, hit it with an impact and it had worked since, so figured i better replace that as it was a bit noisy, cleaned all the grounds on the engine block, new battery, new alternator. same thing, runs perfect for a day or two, then craps out. but finally an engine code. new O2 sensor, and again, ran perfect for a couple days. i erased the adaptive memory and again ran great, then day later craps out. last night i just took off battery cable for 5-10 minutes replaced and it ran fine.
a few more hints, have a remote started on it, during one of the times i "fixed it" it was running in the driveway, and conked out and wouldnt start without using the gas pedal.
i have a new crankshaft sensor as well as a new camshaft sensor sitting in the parts house at the chrysler dealer down the road, i am about to try those next. but without a MIL i just feel i am throwing parts at the problem, although they probably should be replaced at any rate.
i have all but pulled the pin on the grenade at this point, any other spots i should look into?
thanks for any input
RD
i have been chasing this problem for a month now and am readyy to pull my hair out.
vehicle is a 2000 4.0 with around 215k
a couple weeks ago she tried to start her jeep and it wouldnt run at idle, or would run at a very low idle. i messed around a bit and found a corroded positive battery terminal, i cleaned it all up put it all back together and jeep ran perfect. 2 days later, same issue. i followed the positive cable to the fuse block on the firewall, found it corroded as well, cleaned that terminal, ran fine for 3 days, same problem.
the alternator on the vehicle i replaced a couple years ago, found i accidently put it in my scrap barrel, it had been underwater for months and was rusted all to hell, hit it with an impact and it had worked since, so figured i better replace that as it was a bit noisy, cleaned all the grounds on the engine block, new battery, new alternator. same thing, runs perfect for a day or two, then craps out. but finally an engine code. new O2 sensor, and again, ran perfect for a couple days. i erased the adaptive memory and again ran great, then day later craps out. last night i just took off battery cable for 5-10 minutes replaced and it ran fine.
a few more hints, have a remote started on it, during one of the times i "fixed it" it was running in the driveway, and conked out and wouldnt start without using the gas pedal.
i have a new crankshaft sensor as well as a new camshaft sensor sitting in the parts house at the chrysler dealer down the road, i am about to try those next. but without a MIL i just feel i am throwing parts at the problem, although they probably should be replaced at any rate.
i have all but pulled the pin on the grenade at this point, any other spots i should look into?
thanks for any input
RD
