Knucklehead97 Posted February 9, 2014 Share Posted February 9, 2014 Hello all. Been awhile since I've posted, but a couple weeks ago my brothers XJ just... well... wouldn't idle. He was trying to move it to put a for sale sign on it (got tired of dealing with death wobble) but when he cranked it it wouldn't idle. He had to press the gas peddle for it to even make a sound. And after he let off it just immediately died. Seems to have good air flow, no fuel leaks, and good spark plugs. Sensor on the throttle body? Thanks. Oh to anyone that might wonder, finally got the fuel injectors permanently sealed sealed on my MJ. I drove it today and it did great Link to comment Share on other sites More sharing options...
FrankTheDog Posted February 9, 2014 Share Posted February 9, 2014 Idle air control motor on the throttle body acting up. Link to comment Share on other sites More sharing options...
Knucklehead97 Posted February 9, 2014 Author Share Posted February 9, 2014 What should I do? Take it out and mess with it? Also which sensor is it? I'm not familiar with HO's sensor placement. Link to comment Share on other sites More sharing options...
Rockfrog Posted February 10, 2014 Share Posted February 10, 2014 When my XJs battery gets low it won't run .... takes a few minutes driving before it'll idle on it's own. Link to comment Share on other sites More sharing options...
Knucklehead97 Posted February 10, 2014 Author Share Posted February 10, 2014 Would your XJ crank itself though? The starter runs. I would think the starter would need more power than the idle Link to comment Share on other sites More sharing options...
Rockfrog Posted February 10, 2014 Share Posted February 10, 2014 Sometimes enough to crank sometimes not. I leave it parked for 8 days when I work out in camp. Charging is PCM controlled .. if you pull the battery engine won't run like earlier self regulating systems. When I would get enough charge to start the engine I would still have to keep my foot on it until the battery was charged up enough to maintain a running idle ... otherwise it would die every time I shifted into R or D and when I let off the throttle. Still started up each time though. I just chalked it up to having the regulator in the pcm which requires a specific voltage. That and so do all the sensors sending it data. Once I reached a steady state it was good until the next time I forgot to unplug the rechargable flashlight when heading out to work. If the battery is taking a dump ... same scenario. The IAC is the small tube sensor on the injector side of the TB. Two T20 or T25 screws hold it on. Pull and carefully clean it with throttle body cleaner and a toothbrush. Clean the seat inside the housing as well. Link to comment Share on other sites More sharing options...
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