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Unread 12-06-2007, 08:29 AM   #1
Sky Hye
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Help! My TJ has low idle and shuts off

Hey Guys. This problem has been getting more frequent. When I am at a stoplight or parked, My idle is very low, and it kinda feels like it is about to stall.

Whenever I shift the tranny, or put it in reverse, the jeep sometimes stalls.

Its an auto with about 38k miles. Could it be a fuel filter? Tranny fluid? Something else? PLease help, its getting to be a problem. Thanks

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Unread 12-06-2007, 09:22 AM   #2
Jerry Bransford
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Try cleaning your IAC (Idle Air Controller) with throttle body cleaner and a toothbrush. Do a search using my name and IAC cleaning where you'll find a more detail, I'm on my way up to Los Angeles for a meeting.
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Unread 12-06-2007, 09:46 AM   #3
Sky Hye
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Quote:
Originally Posted by Jerry Bransford
Try cleaning your IAC (Idle Air Controller) with throttle body cleaner and a toothbrush. Do a search using my name and IAC cleaning where you'll find a more detail, I'm on my way up to Los Angeles for a meeting.
Great, Thanks Jerry. I will Give it a shot this afternoon and ofcourse if it doesnt help, I'll be back on here.

Please be careful on your way up... Its supposed to be crazy weather tonight and tomorrow morning...
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Unread 12-06-2007, 09:57 AM   #4
Wheelin98TJ
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Jerry always gets to leave the office for JeepForum meetings.

Meanwhile I'm stuck here doing all the work.
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Unread 12-06-2007, 10:14 AM   #5
Sky Hye
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Yea, Some people Just have it nice... I'm just stuck here designing Jeep parts... Life just stinks eh??? hehe
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Unread 12-11-2007, 03:11 PM   #6
Sky Hye
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Quote:
Originally Posted by Jerry Bransford
Try cleaning your IAC (Idle Air Controller) with throttle body cleaner and a toothbrush. Do a search using my name and IAC cleaning where you'll find a more detail, I'm on my way up to Los Angeles for a meeting.
Ok. I cleaned the IAC, and even dismantled nd cleaned the entire Throttle body. I noticed my RPM's vary between 300-200 rpm. It drops really low when I put it into reverse or drive. Help...
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Unread 12-11-2007, 03:30 PM   #7
Giviner
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Did you clean the TPS (throttle position sensor)?

If not I would try that. If that doesn't work, you may need a new sensor.
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Unread 12-11-2007, 03:38 PM   #8
Jerry Bransford
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Quote:
Originally Posted by Jeepguy81
Did you clean the TPS (throttle position sensor)?

If not I would try that. If that doesn't work, you may need a new sensor.
Unless later model TPS's are no longer sealed, they are sealed and cannot be cleaned. At least the TPS on my '97 was sealed and when mine went bad, I had to replace it.
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Unread 12-11-2007, 10:33 PM   #9
Sky Hye
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I sprayed everything else. I figured out the IAC is bad, because the second time I cleaned it, tonght, it failed to start unless I had the throttle open. I then dismantled it and tapped it around a bit and it began idling at 2000 rpm. I got it to where it idles at 1000. So now where can I get an IAC for cheap? Should I risk ebay or a jeep junk yard? are the ZJ and TJ IAC's the same?
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Unread 12-29-2007, 01:08 AM   #10
Sky Hye
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Ok,. latest update. I changed out the IAC. and a few days ago, I was pulling out to make a right turn and it stalled. I was so pissed. The idle also fluctuates, it sounds like a supercharged car's idle, up and down. also when backing up or going slowly with the wheels cranked, the engine revs up and down on its own.
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