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Unread 07-16-2010, 04:58 PM   #1
kb1kzd
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Electrical Gurus... HELP! Stalling out in reverse

97 Jeep 4cyl 5spd stalls in reverse. It basically cuts off the spark when you put it in reverse and release the clutch. It only does it in 2wd. So when i have to back up i basically have to put it in 4wd, back up, put it in 2, then leave.


Any ideas of where to look

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Unread 07-16-2010, 05:02 PM   #2
freeskier93
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WTF. I'm totally stumped.
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Unread 07-16-2010, 05:11 PM   #3
Jerry Bransford
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I've had to troubleshoot a lot of very complex electrical/electronic circuits in the past but knowing the TJ's circuitry in that area fairly well, freeskier93's "stumped" word is a pretty good choice of words for me too.
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Unread 07-16-2010, 05:21 PM   #4
kb1kzd
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Yeah. I'm very confused. I just don't get why it would be fine everywhere but 2wd. I mean 4lo occasionally sputters but not much. I just backed up and went forward multiple tiems in teh driveway. it kills itself backing up in 2wd but not in 4hi...
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Unread 07-16-2010, 05:27 PM   #5
RogerH
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My bet is theres a short in the cluster assembly somewhere and its getting to the keyswitch killing signal to the computer from the keyswitch being in the on position, and when you put it in 4 hi and it changes something in the dash for the little indicator light for which gear your transfer case is in allowing it to continue running, but the only thing that would be sending a signal off of the transmission is the reverse switch. Try unplugging it maybe.
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Unread 07-16-2010, 07:33 PM   #6
freeskier93
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The only electrical system effected by reverse is the reverse light switch, but how the heck could that be wired into anything that can kill the engine? Maybe you have a short or something? Like rogerh said, try unplugging the reverse light switch.

Maybe something in the T-case? Try unplugging everything electrical from the t-case and tranny. It has to be something on one of those two.
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Unread 07-16-2010, 07:58 PM   #7
kb1kzd
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I'll try it. I find it odd that i can put it in reverse in 2wd, and hold the clutch all day long. But as soon as i let the clutch out it sputters and dies. Sometimes i can be very gentle and it will idle out but if i put any amount of fuel to it or load it cuts it out immediatly.
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Unread 07-16-2010, 08:50 PM   #8
RogerH
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Could possibly be the clutch safety switch as well shorting out through something you could try jumping across that or pulling the fuse for it like some do for the "key crawl" trick, i want to say its fuse 20 but im probably off as mines got a 32rh in it.
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Unread 07-16-2010, 11:00 PM   #9
wushaw
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Check your crank pos sensor for security and connection, also check your cam pos sensor. Then on to every other connection wire...etc
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Unread 07-16-2010, 11:49 PM   #10
bruteboy
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possible engine mount problem.
when backing up,the engine may torque over enough to break a connection in the wiring harness or cause something to ground out.
wiggle or tug on all wiring harnesses with the engine running,if engine stalls,look for loose connections or bare
wires.
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2.5L , 2.5 liter , stalls , reverse , no spark

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