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Unread 10-22-2009, 09:34 PM   #46
skeeterbeater
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yeah only bad part was it took a week of driving it with the scan tool hooked up because it would never do it with the scan tool hooked up got some weird looks when my jeep died and i jumped out with a big smile on my face and did a dance lol

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Unread 10-22-2009, 11:02 PM   #47
Apollo12227
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Meh, for the life of me I cant figure this crap out... I'll have a youtube video up tomorrow that'le show what it's doing... Pretty amazing to watch, its the grimlin from hell! lol... I've got a couple of things to try still, thanks to you guys.
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Unread 10-22-2009, 11:04 PM   #48
Joe Dillard
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Would you happen to have somebody local who'd be willing to swap ECM's with you for a test?

You'd want a 4.0L auto tranny ECM.

Hmm, something about it being only in a forward gear has me thinking it could be column or shift/tranny electrical related.
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Unread 10-22-2009, 11:29 PM   #49
Apollo12227
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Originally Posted by Joe Dillard View Post
Would you happen to have somebody local who'd be willing to swap ECM's with you for a test?

You'd want a 4.0L auto tranny ECM.

Hmm, something about it being only in a forward gear has me thinking it could be column or shift/tranny electrical related.
Will any 4.0 with auto tranny ECM work? The junkyards around here are completly full of Cherokees around my year with the exact same motors as mine but with 5 spd overdrive auto trannys.. Will cherokee ecms work? I've heard ecms can come "vin locked" or something and only work in birth vehicle... I would hate to give junkyard dudes my money for an ECM that won't run
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Unread 10-23-2009, 12:35 AM   #50
tonythehazelnut
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That's a good question.. I've been wondering that myself. If you bought a used ECM from a boneyard would you have to have it flashed?
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Unread 10-23-2009, 01:53 AM   #51
Bl4cK_kNiF3
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any chance it could be related to a neutral safety switch? it wont start unless its in neutral or park and you said it only dies in drive. Im not sure if its related, but noone mentioned it and i thought it might make a difference.

sounds like a real irritating problem.. best of luck to you man!
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Unread 10-23-2009, 06:37 AM   #52
Que89YJ
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Its not the ECM with the forward or reverse issue being the symptom. The jumpers were to insure that the power was not being dropped by the PCM to the relay contols. The next thing I was going to have you try is to jump power to those real slots directly from the battery. After I reread your post I am wondering if I am looking in the right area. You still have the 11 code that is being set everytime this occurs. You need to make sure.

Clear and check the faults, make the event occur and then recheck.

Next thing is to do a quick crawl underneath the heap and disconnect the harness that goes to the trans. Also in the PDC remove fuse 5 - its a 10 amp for the trans. That effectively isolates the trans. Start and see if you still have the issue.

Last is the final step for the relays that eliminates the steering column. Jumper both the fuel pump and ASD relays output terminals that you jumpered before directly to the battery at the same time. I know its a little intimidating but the only thing you are eliminating the entire steering column.

One of these will make a difference and will tell you where to look next.

Oh yeah...disconnect the nuetral saftey switch after its running....LOL wont start without it

Last edited by Que89YJ; 10-23-2009 at 12:24 PM..
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Unread 10-23-2009, 06:39 AM   #53
5.7YJ
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Originally Posted by Apollo12227 View Post
Thanks for the input TSE, i'll definatly look into replacing the ignition switch where the key goes into, apparently there is some other fuse or switch or something that a lot of people have go out on them? The only switch I know is the one the key plugs into... is the culperate, the column shifter is right next to it, perhaps the ignition is shorting our or something as I reach drive, where it doesnt in reverse, neutral, or park...
There is an ignition switch on top of the steering column under the dash, it has contacts in it that are notorious for going bad in a Jeep due to it being open to the elements. The wires that go to it go to your ignition and all other things electrical, I mentioned this on page one. It and it's wires also run close to the shift linkage that I mentioned earlier.


Last edited by 5.7YJ; 10-23-2009 at 09:08 AM..
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Unread 10-23-2009, 11:32 AM   #54
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Anks guys I'll look at it all tonight around 7 and through tomorrow too.. I think you guys have about got it figured out.. I'll perform the tests and get back with the results. Thanks again.
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Unread 10-23-2009, 11:37 AM   #55
Joe Dillard
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I predict you're gunna hit a home run soon!
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Unread 10-23-2009, 02:48 PM   #56
Apollo12227
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sure hope so Joe I'm telling you lol I've never seen anything like this in my life lol. Only two more hours to go here at work and I'll head home and try to slip a few more tests in.
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Unread 10-23-2009, 02:55 PM   #57
5.7YJ
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An ignition switch is only about 12 or 13 dollars and dosen't take that long to replace, might be worth a try. And while you have it out and disconected from the column, you can get a good look at the wires under there.
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Unread 10-23-2009, 03:24 PM   #58
Apollo12227
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Originally Posted by 5.7YJ View Post
An ignition switch is only about 12 or 13 dollars and dosen't take that long to replace, might be worth a try. And while you have it out and disconected from the column, you can get a good look at the wires under there.
I'm at work right now so I can't look for myself but does anything need to be removed to access the switch you are talking about? The guage pod? Steering wheel? Etc?
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Unread 10-23-2009, 05:05 PM   #59
ghost183
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im curious

but for diagnosing purposes mostly and the process of elimination..

jump the distributor, using pair of jumper wires

1) from the pos of the battery to the pos of the dist, check which is pos before you jump it

2) neg from battery to engine block


then test it and see if itll die, and come back and tell us

just remember, you wont be able to shut off the engine using the key until you pull the jumpers off..
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Unread 10-23-2009, 05:50 PM   #60
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Crap I'm not going to be able to test any of the above posts until tomorrow afternoon... I'll have the results for all the above tests here by tomorrow night for sure. Q89YJ and ghost183, i'll be trying all of your suggestions tomrrow, so dont think your efforts to help me out are going unnoticed, I just cant work on it until tomorrow around 2pm Eastern and will have the results up ASAP, along with the youtue video of the jeep doing what it's doing, and hopefully a video showing it FIXED!!!

Thanks again guys for helping me out, you have no idea how much this stuff helps, I had no idea where else to turn before posting this problem...
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