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  #13  
Old 11-15-2010, 12:22 PM
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Re: another 4.7ho swap question

Here are some pics. These first ones deal with the knock sensors They hook intothe harness on the drivers side cyl bank.










The rest are misc pics.

















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  #14  
Old 11-16-2010, 02:02 AM
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Re: another 4.7ho swap question

Thanks for the pics cheapjeep! I spent a few hours mapping out each pin on each connector including the PCM and the TCM over the weekend and comparing the 2003 HO to the 2000 non-HO. I learned a ton and will have some solid info for those that are taking on this swap. There are differences of course and I plan on making a nice list of them. I just dropped the engine in tonight and half hooked up the tranny to it so I have a few days before it is on the road but I am hoping to hear it run or at least start in a couple days. I will have plenty of pics and do's and don'ts for this swap. If it wasn't so late I would post now what I have run into but I will save that for when both my eyes are open enough to see the screen when I type.
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  #15  
Old 11-16-2010, 04:52 AM
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Re: another 4.7ho swap question

good luck man... i know swapping my 5.2 in over my 4.0 was SIMPLE. literally less than 5 connectors, and done. and just a FYI, those 4.7 HOs sound like a dang top fuel dragster with open headers, prob even louder than my 5.2 was with open headers... ask me how i know. and how many ppl hated me for doing it at 4am.. bahahahah
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  #16  
Old 11-20-2010, 01:40 PM
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Re: another 4.7ho swap question

How's progress Brian ?
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  #17  
Old 11-21-2010, 01:20 AM
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Re: another 4.7ho swap question

The status currently is that the swap is complete and the vehicle is now driving around with the HO engine. I am out of town for most of this week but I will be making a full write-up for swapping an '03 HO motor in a '00 non-HO WJ. The Jeep is driving good right now with only a few minor issues that aren't critical. I will post some pics and explain the problems and solutions I encountered while doing this swap. I learned a ton on the compatibilities between the two engines and all the electronics. Should save people a lot of hassle if they are going to do this swap. I want to thank everyone who helped me get this ball rolling because I was relying on you guys to give me enough hope that this isn't too bad of a job.

I should have this info available sometime in the next week or just after the holiday if I don't find the time.

Brian
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  #18  
Old 11-21-2010, 01:55 AM
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Re: another 4.7ho swap question

Now thinking about this it would have been a lot easier if your WJ was an '02 seeing as the HO was nonexistent till then You really had your hands full. Glad she's pounding pavement again!
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  #19  
Old 12-01-2010, 12:59 AM
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Re: another 4.7ho swap question

Well all, here is an update with the swap I did. I have been driving this thing for just over a week now and I have had no real problems with it except I think my heater core started leaking. I think that was due to the three coolant flushes this thing has seen before and after the engine was swapped. There are a few things to note for someone who is looking at installing a 2003 4.7 HO in a 2000 non-HO 4.7 WJ. Everything went pretty well with some minor issues with sensors and things like that.

Here is a quick rundown on what I used to make this thing work.

-I used the stock PCM and TCM. I got an SCT tune from hemifever to make the PCM work with the new engine.
-I used the stock wiring harness that came with my '00 Jeep's 4.7 on the HO motor.
-I am not using my knock sensors because of the lack of wiring needed to make them work.
-I am not using the two bank O2 sensors that came on the original Y-pipe because the lack or wiring needed to make those useable.
-I swapped the non-HO oil pressure sending unit, and the MAP sensor from my orginal engine over to the HO engine because the sensors were not compatible with my original wiring harness and PCM. All other HO sensors work with my '00 factory PCM.
-I am using the stock factory '00 transmission (45RFE) that came behind my 4.7
-I am using the HO's air box and air hat because I got it with the engine.

Below I have a pic of the two engines side by side. This was a good time to compare them and swap over parts if needed.

I did have the '03 HO's wiring harness, PCM, and TCM when I started this swap. I didn't know what I was going to need or use. I mapped out all the wiring to make sure nothing was going to make things worse if I plugged in the newer PCM to the older wiring harness. All the critical wires are the same on both the old and new PCM and the TCM. The '03 PCM has some additional wires going to it because of the knock sensors and the additional O2 sensor and the heating elements. After installing the HO engine with the non-HO wiring harness hooked up to everything I did fire the engine with the '03 HO PCM. It did run fine but gave a check engine light for the missing sensors. I do believe that using the newer PCM will cause issues once it warms up and goes into closed loop. I didn't go this route because of the fact that the PCM would be looking for input from the knock and O2 sensors and also because the security system wouldn't recognize my key so the engine only ran for 4 seconds or so.

I found using the '03 HO's PCM with the HO engine in an '00 WJ would be kind of pointless. In order to use the knock sensors you need to replace a major part of the vehicles wiring that leads into the power distribution block. That mess of wires leads back into the fuse panel through the firewall. The '03 HO's wiring harness has an additional plug that runs the knock sensors and different O2 sensor connectors. Using the new PCM with the HO's wiring harness meant that I would have to add the third O2 sensor by getting a Y-pipe from the HO's donor vehicle, get all new O2 sensors to match up to the fittings, and replace a crap ton of wiring that didn't look like an easy task not having access to the donor vehicle. I figured at this point is was much cheaper and easier to just use the stock PCM with plans of an SCT tune to make it work with the unique fuel and timing that the HO has. After a couple starts and short runs with the '03 PCM I pulled it and put in the '00 PCM. I was able to drive this Jeep with the stock '00 PCM tune, I took it to get some premium fuel before I parked it awaiting my SCT from Sean (hemifever). With the SCT tune installed my stock PCM is now running the Jeep quite nicely.

I still have to get a wideband o2 sensor so hemifever can dial the tunes in perfectly, but as it stands now, the Jeep is driving great. The other day I took my Gtech Pro out and did some 0-60 runs to see how things were working. After warming up eveything, I did two runs both ways on a nice flat road hitting 60mph in 7.02 and 7.10 seconds. I then did another run in 7.08 seconds to finish the day off. The Jeep ran nicely with no pinging on 93 octane all the way through to redline. I know I am close with the tunes because the stock 0-60 time for the 4.7 HO is right around 7 seconds flat so I am quite happy so far and the gas mileage is up around 19-20mpg cruising around.

Below are the two engines side by side. HO is on the right.



So far so good, I will edit this as I figure out more stuff or if I see I missed something.

thanks to all who have helped!

Brian
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File Type: jpg two4.7srs.jpg (50.1 KB, 111 views)
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  #20  
Old 12-01-2010, 07:34 AM
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Re: another 4.7ho swap question

awesome work bro!
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  #21  
Old 12-01-2010, 04:38 PM
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Re: another 4.7ho swap question

Yeah! Our very first sticky! Great writeup Brian! And thanks Scott for the sticky as this is good info for anybody considering this swap.
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OK, fine...I'll admit...some amber lamps are good, and necessary.
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  #22  
Old 12-01-2010, 05:10 PM
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Re: another 4.7ho swap question

wow that is some good info nice job on the swap
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  #23  
Old 12-06-2010, 11:23 AM
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Re: another 4.7ho swap question

Hello all I'm a newbie from Iowa. My mechanic is in the process of the same engine swap on my 99 WJ and I was wondering if you changed the crank tonner to the 16 or kept it at 32? Thanks for the details on the swap!
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  #24  
Old 12-23-2010, 12:56 AM
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Re: another 4.7ho swap question

Great info!

So i'm guessing that the HO motor would also have to be 16t and jtec since you were able to swap the PCM's in and out.

Great info on the sensor swap needed as well!

Thanks
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