2.5L to 4.0L final stage issues - Pirate4x4.Com : 4x4 and Off-Road Forum

smackTJ · 03-10-2006, 10:08 PM

MY problem:

Own a 1997 TJ 4banger, AX5 - swapped in the 4.0L from 2000 Sahara along with the AX-15. Donor vehicle included engine harness and computer. Installed engine and tranny - no problem. Recently completed engine harness wiring - and all final details of installation. When it came to start- NOTHING. After adjusting all the conection on engine harness and replacing fuel pump- engine cranked! Engine roars on, and after 2-3 seconds it shuts right OFF! SAME RESULTS OVER OVER OVER OVER OVER OVER OVER.....

I can't figure it out, after reading the forums I realized everyone has issues with the swap...... I am in way to deeeep to pull out now. ANY HELP WOULD BE GREATLY APPRECIATED.

dakotaparts.com · 03-10-2006, 11:23 PM

Auto Shutdown Relay!!!

Randall Edge · 03-11-2006, 05:09 AM

Sentry Key? It's pretty common on Saharas.

wiggamoe · 03-11-2006, 07:16 AM

x2 on the auto shutdown relay.
replace that sum bitch.

NothernAZxj · 03-11-2006, 07:24 AM

what did ya do with the 2.5 and wiring harness?

smackTJ · 03-11-2006, 08:20 AM

The relay huh, well that will be next step. I am no electric expert, but I imagine that it ain't that hard?

As for the gent that asked about the wire harness, i have it there, e-mail me @ smacktj@sbcglobal.net - for details

I will keep you guys posted as to what happens with my darn 4 to 6 banger project........almost finalized....

v10sport · 03-11-2006, 12:08 PM

Sounds like a sentry key to me. If you dont have the coded key, it will fire up then stall after a few seconds

Randall Edge · 03-11-2006, 12:41 PM

Quote:

Originally Posted by v10sport

Sounds like a sentry key to me. If you dont have the coded key, it will fire up then stall after a few seconds

Yep, but I bet his SE didn't have Sentry Key to start with so He is gonna have to figure out how to get the parts to give it Sentry Key or to give the PCM the correct signal or maybe he can just get the pcm flashed to remove the Sentry Key. Of course it would be easier to swap the relay mentioned above first. He may get lucky, but my money is on the Sentry Key.

JeepnYJ · 03-11-2006, 03:41 PM

i'll X3 or 4 or whatever the key. What your discribing is exactly what the Sentry key system is designed to do. In the donor car there would have been a Sentry key system control module under the dash on the column. When the car is turned on the module sends an RF signal to the key, and then the key will send one back. When the signal is said to be valid it sends a signal to the PCM that everything is good to go. So not only would you need to get that Sentry control module.. you'd have to go get keys programed from the dealer so you could use use it. I'd say your best option would be to find a computer that came from a 4.0 that didn't have the Sentry Key system.

NothernAZxj · 03-11-2006, 03:45 PM

Quote:

Originally Posted by JeepnYJ

i'll X3 or 4 or whatever the key. What your discribing is exactly what the Sentry key system is designed to do. In the donor car there would have been a Sentry key system control module under the dash on the column. When the car is turned on the module sends an RF signal to the key, and then the key will send one back. When the signal is said to be valid it sends a signal to the PCM that everything is good to go. So not only would you need to get that Sentry control module.. you'd have to go get keys programed from the dealer so you could use use it. I'd say your best option would be to find a computer that came from a 4.0 that didn't have the Sentry Key system.

anyone have a pic of this sentry key

http://www.bypasskit.com/product.asp...KU-CH&catid=16

JeepnYJ · 03-11-2006, 03:50 PM

Another pic:

NothernAZxj · 03-11-2006, 03:55 PM

thanks....there is a bypass kit in my post above

JeepnYJ · 03-11-2006, 03:56 PM

Yeah, you still need the original keys to program the bypass module though

Quote:

Programming Key Requirements: 2 keys required for programming purposes

Install manual for said Bypass Module

ZR1025 · 03-11-2006, 04:17 PM

Get a PCM from a 2000 TJ sport or X. Call a junkyard and ask for a computer without the sentry key option.(For one of the above models)

Also if you get one make sure it's from a standard shift TJ. It will make life easier on you if you need to smog the jeep.

Randall Edge · 03-11-2006, 06:19 PM

Quote:

Originally Posted by JeepnYJ

Yeah, you still need the original keys to program the bypass module though

Maybe not. You don't need two keys to program a new key. So maybe the same applies for the module. You can get a key from the dealer if you only have one good key. It cost about $150 here at the local dealer. I assume you could get a key even if you have no good keys to start with. I would ask about flashing the PCM to make it non Sentry Key. Then price a non Sentry PCM.

Randall Edge · 03-11-2006, 06:28 PM

I just looked at the bypass module. It looks like it just emulates a key. You can use a regular $2 key from Home Depot to start the Jeep. You get the same effect by programming a spare key ($20 on ebay + $2 to have cut locally) then taping it inside the cover of the steering column.

Either way it won't work for a SE that didn't come with Sentry because the transponder and wiring and such isn't there.

smackTJ · 03-12-2006, 08:42 AM

Let me get this str8, I screwed because of that small oversight! Man, I had done my homework, and thought that I had everything lined up. I was looking at the bypass kits, but like one of the Jeepers said, my SE doesn't have this requried module(receiver) At this point, I am going to try using my buddy's computer off his 2000 TJ, if it works t hen we'll just have to salvage yard shopping! If anyone actually lived this, I would appreciate your personal horror story. FYI, swapping out the 4banger for the 6 banger has been alot more work than I had hoped for, I just hope that str8 6 has as much power as all the Jeepers say it does! Thanks for looking out for my Life, I mean my Jeep.....samething!

JeepnYJ · 03-12-2006, 09:05 AM

Quote:

Originally Posted by Randall Edge

Maybe not. You don't need two keys to program a new key. So maybe the same applies for the module. You can get a key from the dealer if you only have one good key. It cost about $150 here at the local dealer. I assume you could get a key even if you have no good keys to start with. I would ask about flashing the PCM to make it non Sentry Key. Then price a non Sentry PCM.

Yeah, but it doesn't sound like hes got a key anyway so he wouldn't be able to program anything. But like others and myself have said.. you should be able to get a computer from a non Sentry Key TJ.

Randall Edge · 03-12-2006, 09:08 AM

Good luck man. The best mod I ever did with my old SE was trading it for a Sport, but if I had stuck with it for another couple of years it would have been paid for and I could have easily afforded to swap engines once I was done making payments. I would have saved several thousand $$. Oh well, I got the Sport now and I'm keeping it for a while.

I bet yours fires right up with the new computer.

Randall Edge · 03-12-2006, 09:10 AM

Quote:

Originally Posted by JeepnYJ

Yeah, but it doesn't sound like hes got a key anyway so he wouldn't be able to program anything. But like others and myself have said.. you should be able to get a computer from a non Sentry Key TJ.

I think the dealer can program it without an existing key, but I doubt you can convince them to program it to work with the bypass anyway. A new computer is the way to go IMHO.

JeepnYJ · 03-12-2006, 03:39 PM

Quote:

Originally Posted by Randall Edge

I think the dealer can program it without an existing key, but I doubt you can convince them to program it to work with the bypass anyway. A new computer is the way to go IMHO.

Yep, and the dealer programming the key is $$$$ my buddy had to pay 150 bucks or so to get A new key made for his Camero which had the same basic function.

Randall Edge · 03-16-2006, 03:28 AM

Any updates on this?

smackTJ · 03-16-2006, 09:50 AM

Well, the shutdown relay didn't do the trick. I am currently looking for the ECM from a 00 Sport. Turns out I only was able to test w/ a 99 -my jeep has no distributor. How sure are some of you guys that the ECM from another vehicle would do the trick? I am looking online for some, but most of the places I call aren't 100% sure that the computer was from a SPORT or SAHARA or X - most places I call don't offer refunds either. I only ask cause at this point I am a little more nervous about the upgrade...lot a money spend so far.....

JeepnYJ · 03-16-2006, 02:36 PM

I can't think of anything else it would be. My buddies Camaro with the pass-lock did the same thing when he lost his original keys and had one made. He ended up having to go get a new key from the dealership. But since this isn't really an option for you The new ECM should do the trick.

Randall Edge · 03-16-2006, 08:51 PM

Yep, I think it's the PCM. I'd call a dealer and see what they say can be done about it. Yours probably isn't bad, it just doesn't fit your application. Perhaps they have a way to change it. That would likely cost more than you can buy a PCM for, but you never know.

03-10-2006, 10:08 PM	#1 (permalink)
smackTJ Registered User Join Date: Sep 2005 Member # 53857 Location: TX Posts: 15	2.5L to 4.0L final stage issues MY problem: Own a 1997 TJ 4banger, AX5 - swapped in the 4.0L from 2000 Sahara along with the AX-15. Donor vehicle included engine harness and computer. Installed engine and tranny - no problem. Recently completed engine harness wiring - and all final details of installation. When it came to start- NOTHING. After adjusting all the conection on engine harness and replacing fuel pump- engine cranked! Engine roars on, and after 2-3 seconds it shuts right OFF! SAME RESULTS OVER OVER OVER OVER OVER OVER OVER..... I can't figure it out, after reading the forums I realized everyone has issues with the swap...... I am in way to deeeep to pull out now. ANY HELP WOULD BE GREATLY APPRECIATED. __________________ smackTJ [B]O\|\|\|\|O[/B]

03-11-2006, 05:09 AM	#3 (permalink)
Randall Edge Registered User Join Date: Jul 2002 Member # 12992 Location: Savannah, Ga. Posts: 258	Sentry Key? It's pretty common on Saharas. __________________ '48 Willys Truck.....sorta...... Last edited by Randall Edge; 03-11-2006 at 05:11 AM.

03-11-2006, 07:24 AM	#5 (permalink)
NothernAZxj Registered User Join Date: Dec 2001 Member # 8528 Location: Flagstaff AZ Posts: 1,846	what did ya do with the 2.5 and wiring harness? __________________ Brian Harmon

03-11-2006, 08:20 AM	#6 (permalink)
smackTJ Registered User Join Date: Sep 2005 Member # 53857 Location: TX Posts: 15	The relay huh, well that will be next step. I am no electric expert, but I imagine that it ain't that hard? As for the gent that asked about the wire harness, i have it there, e-mail me @ smacktj@sbcglobal.net - for details I will keep you guys posted as to what happens with my darn 4 to 6 banger project........almost finalized.... __________________ smackTJ [B]O\|\|\|\|O[/B]

03-11-2006, 12:08 PM	#7 (permalink)
v10sport Granite Guru Join Date: Sep 2003 Member # 23066 Posts: 563	Sounds like a sentry key to me. If you dont have the coded key, it will fire up then stall after a few seconds __________________ 09 JK unlimited Rubicon 07 2500 CTD Ram 02 Grand Cherokee 79 Cherokee WT 360/T18/Dana 20 ]

03-10-2006, 11:23 PM	#2 (permalink)
dakotaparts.com Registered User Join Date: Oct 2005 Member # 56125 Posts: 66	Auto Shutdown Relay!!!

03-11-2006, 07:16 AM	#4 (permalink)
wiggamoe Registered User Join Date: Jul 2004 Member # 33498 Location: Indianapolis, IN Posts: 680	x2 on the auto shutdown relay. replace that sum bitch.

03-11-2006, 03:41 PM	#9 (permalink)
JeepnYJ Registered User Join Date: Jun 2004 Member # 32246 Posts: 20	i'll X3 or 4 or whatever the key. What your discribing is exactly what the Sentry key system is designed to do. In the donor car there would have been a Sentry key system control module under the dash on the column. When the car is turned on the module sends an RF signal to the key, and then the key will send one back. When the signal is said to be valid it sends a signal to the PCM that everything is good to go. So not only would you need to get that Sentry control module.. you'd have to go get keys programed from the dealer so you could use use it. I'd say your best option would be to find a computer that came from a 4.0 that didn't have the Sentry Key system.

03-11-2006, 03:50 PM	#11 (permalink)
JeepnYJ Registered User Join Date: Jun 2004 Member # 32246 Posts: 20	Another pic: Last edited by JeepnYJ; 03-11-2006 at 03:53 PM.

03-11-2006, 03:55 PM	#12 (permalink)
NothernAZxj Registered User Join Date: Dec 2001 Member # 8528 Location: Flagstaff AZ Posts: 1,846	thanks....there is a bypass kit in my post above __________________ Brian Harmon

03-11-2006, 04:17 PM	#14 (permalink)
ZR1025 Registered User Join Date: Dec 2005 Member # 62902 Posts: 14	Get a PCM from a 2000 TJ sport or X. Call a junkyard and ask for a computer without the sentry key option.(For one of the above models) Also if you get one make sure it's from a standard shift TJ. It will make life easier on you if you need to smog the jeep.

03-11-2006, 06:28 PM	#16 (permalink)
Randall Edge Registered User Join Date: Jul 2002 Member # 12992 Location: Savannah, Ga. Posts: 258	I just looked at the bypass module. It looks like it just emulates a key. You can use a regular $2 key from Home Depot to start the Jeep. You get the same effect by programming a spare key ($20 on ebay + $2 to have cut locally) then taping it inside the cover of the steering column. Either way it won't work for a SE that didn't come with Sentry because the transponder and wiring and such isn't there. __________________ '48 Willys Truck.....sorta......

03-12-2006, 08:42 AM	#17 (permalink)
smackTJ Registered User Join Date: Sep 2005 Member # 53857 Location: TX Posts: 15	Let me get this str8, I screwed because of that small oversight! Man, I had done my homework, and thought that I had everything lined up. I was looking at the bypass kits, but like one of the Jeepers said, my SE doesn't have this requried module(receiver) At this point, I am going to try using my buddy's computer off his 2000 TJ, if it works t hen we'll just have to salvage yard shopping! If anyone actually lived this, I would appreciate your personal horror story. FYI, swapping out the 4banger for the 6 banger has been alot more work than I had hoped for, I just hope that str8 6 has as much power as all the Jeepers say it does! Thanks for looking out for my Life, I mean my Jeep.....samething! __________________ smackTJ [B]O\|\|\|\|O[/B]

03-12-2006, 09:08 AM	#19 (permalink)
Randall Edge Registered User Join Date: Jul 2002 Member # 12992 Location: Savannah, Ga. Posts: 258	Good luck man. The best mod I ever did with my old SE was trading it for a Sport, but if I had stuck with it for another couple of years it would have been paid for and I could have easily afforded to swap engines once I was done making payments. I would have saved several thousand $$. Oh well, I got the Sport now and I'm keeping it for a while. I bet yours fires right up with the new computer. __________________ '48 Willys Truck.....sorta......

03-16-2006, 03:28 AM	#22 (permalink)
Randall Edge Registered User Join Date: Jul 2002 Member # 12992 Location: Savannah, Ga. Posts: 258	Any updates on this? __________________ '48 Willys Truck.....sorta......

03-16-2006, 09:50 AM	#23 (permalink)
smackTJ Registered User Join Date: Sep 2005 Member # 53857 Location: TX Posts: 15	Well, the shutdown relay didn't do the trick. I am currently looking for the ECM from a 00 Sport. Turns out I only was able to test w/ a 99 -my jeep has no distributor. How sure are some of you guys that the ECM from another vehicle would do the trick? I am looking online for some, but most of the places I call aren't 100% sure that the computer was from a SPORT or SAHARA or X - most places I call don't offer refunds either. I only ask cause at this point I am a little more nervous about the upgrade...lot a money spend so far..... __________________ smackTJ [B]O\|\|\|\|O[/B]

03-16-2006, 02:36 PM	#24 (permalink)
JeepnYJ Registered User Join Date: Jun 2004 Member # 32246 Posts: 20	I can't think of anything else it would be. My buddies Camaro with the pass-lock did the same thing when he lost his original keys and had one made. He ended up having to go get a new key from the dealership. But since this isn't really an option for you The new ECM should do the trick.

03-16-2006, 08:51 PM	#25 (permalink)
Randall Edge Registered User Join Date: Jul 2002 Member # 12992 Location: Savannah, Ga. Posts: 258	Yep, I think it's the PCM. I'd call a dealer and see what they say can be done about it. Yours probably isn't bad, it just doesn't fit your application. Perhaps they have a way to change it. That would likely cost more than you can buy a PCM for, but you never know. __________________ '48 Willys Truck.....sorta......

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