milehigh
NAXJA Forum User
- Location
- Denver, CO
I hate to post without doing any research, but Im at work and trying to head out on a road trip after work to make it home for the holidays-+. 2000 XJ, 4.0, AW4, NP242, fairly stock with 142k.
Cold this morning, 20's, jeep didnt want to start. Tried cranking a few times nothing happened. Tried again a few more times pressing the pedal maybe a 1/4-1/2 way down. Finally fired up but ran really rough had to hold the throttle for maybe 30 sec then would run on its own still a bit rough, kinda low idle 400ish. Shut it off and tried to fire it back up better than the first time but still had to use the throttle. Proceeded to do this a few more times and by the third or fourth try it would fire on its own. Idle quality was better but not what it should be. I will note that during this start and stop process that it had ran long enough to warm up to oh say 150 degrees. Drove it to work with no problems.
Check engine light is on, but didnt have time to check codes. No parts stores open at 5 am. It has had a weird problem of popping at random a code for the idle circuit, cant remember the code off the top of my head. In trying to troubleshoot that problem I cleaned the TB on the car and replaced the IAC. Checked and cleaned electrical contacts on the EMC and the IAC. I thought the problem went away when I replaced the IAC but it may be back.
At this point Im wondering if its my TPS. I hope to hell it isnt the EMC slowly giving up the ghost. Wouldnt the Cam posistion sensor prevent it from starting all together pedal pressed or not? I have never changed either the crank or cam and have heard those to be problematic. I would imagine the crank would be a no run, but the cam may allow it to run but not start? Ideas suggestions? Thanks in advance.
Cold this morning, 20's, jeep didnt want to start. Tried cranking a few times nothing happened. Tried again a few more times pressing the pedal maybe a 1/4-1/2 way down. Finally fired up but ran really rough had to hold the throttle for maybe 30 sec then would run on its own still a bit rough, kinda low idle 400ish. Shut it off and tried to fire it back up better than the first time but still had to use the throttle. Proceeded to do this a few more times and by the third or fourth try it would fire on its own. Idle quality was better but not what it should be. I will note that during this start and stop process that it had ran long enough to warm up to oh say 150 degrees. Drove it to work with no problems.
Check engine light is on, but didnt have time to check codes. No parts stores open at 5 am. It has had a weird problem of popping at random a code for the idle circuit, cant remember the code off the top of my head. In trying to troubleshoot that problem I cleaned the TB on the car and replaced the IAC. Checked and cleaned electrical contacts on the EMC and the IAC. I thought the problem went away when I replaced the IAC but it may be back.
At this point Im wondering if its my TPS. I hope to hell it isnt the EMC slowly giving up the ghost. Wouldnt the Cam posistion sensor prevent it from starting all together pedal pressed or not? I have never changed either the crank or cam and have heard those to be problematic. I would imagine the crank would be a no run, but the cam may allow it to run but not start? Ideas suggestions? Thanks in advance.