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  #1  
Old April 13th, 2011, 15:43
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CTeunuch CTeunuch is offline
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XJ engine/transmission swap questions

I have a few questions before I tear the heart out of my XJ and find out things won't work. The XJ is an 89, Renix/AW4/231, and the donor drivetrain is from a 93 ZJ 4.0HO/AW4/242. My only concern is wiring differences between the two as I don't have the ZJ's harness anymore. I know I'll need the Hesco TPS sensor adapter to run the HO intake/throttle body of the Renix computer, but is there anything else that won't be essentially plug&play? I have no problem cutting plugs from a JY and splicing them in to the XJ harness if need be, but will that be all? What about issues with the AW4 plugs between the 89 and 93? Thanks for any help and advice.
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  #2  
Old April 13th, 2011, 16:22
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Re: XJ engine/transmission swap questions

You need to install your sensors into the donor engine. The ZJ sensors wont work with your computer.
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  #3  
Old April 13th, 2011, 16:31
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Re: XJ engine/transmission swap questions

Swap over your intake and exhaust manifolds using th eRenix gasket, sensors, distributor and flexplate/flywheel. Good to go.
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  #4  
Old April 14th, 2011, 14:50
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Re: XJ engine/transmission swap questions

Quote:
Originally Posted by cruiser54 View Post
Swap over your intake and exhaust manifolds using the Renix gasket, sensors, distributor and flexplate/flywheel. Good to go.
I really want to ditch as much Renix stuff as possible. Not only for the power gain, but to get rid of as many vacuum lines as I can. The PO tore every line out, and then put them back in all wrong. I've searched everywhere but can't find the leaks, so I ended up adjusting the idle speed down at the throttle blade for now. My main concern is the transmission sensors and controls, because I'd rather not end up shifting it with a series of switches like I've seen some do. I can make the engine sensors all work based on info I've found online, but I haven't read much on differences in transmission years. Thanks again for any help.
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  #5  
Old November 30th, 2012, 10:13
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Re: XJ engine/transmission swap questions

I don't think that zj trans is an AW4
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  #6  
Old November 30th, 2012, 12:49
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Re: XJ engine/transmission swap questions

Quote:
Originally Posted by CTeunuch View Post
I really want to ditch as much Renix stuff as possible. Not only for the power gain, but to get rid of as many vacuum lines as I can. The PO tore every line out, and then put them back in all wrong. I've searched everywhere but can't find the leaks, so I ended up adjusting the idle speed down at the throttle blade for now. My main concern is the transmission sensors and controls, because I'd rather not end up shifting it with a series of switches like I've seen some do. I can make the engine sensors all work based on info I've found online, but I haven't read much on differences in transmission years. Thanks again for any help.
There will be no power gain by eliminating the Renix vacuum harnesses.

Adjusting the screw on the throttle body is absolutely not the correct way to set the idle.

Vacuum leaks are easily found using throttle body cleaner.

When you need the correct procedure to set the throttle body back where it's supposed to be, post up and I'll give you the instructions.
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Old November 30th, 2012, 16:43
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Re: XJ engine/transmission swap questions

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Originally Posted by cruiser54 View Post
There will be no power gain by eliminating the Renix vacuum harnesses.

Adjusting the screw on the throttle body is absolutely not the correct way to set the idle.

Vacuum leaks are easily found using throttle body cleaner.

When you need the correct procedure to set the throttle body back where it's supposed to be, post up and I'll give you the instructions.
First of all, the Jeep is junked and I don't know why this thread was brought back up.

Second, I wasn't trying to gain power by eliminating the Renix vacuum lines, I was trying to clean up the engine bay, and get rid of all the leaks/incorrectly routed lines. I know how to set idle properly, but that wasn't the goal. The goal was to get it to stop idling at 1500 RPM so I could drive and wheel it for a while. I tried to find the vacuum leaks using ether and throttle body cleaner to raise/lower the idle, with no luck. After gutting the vacuum harness and broken emissions crap I adjusted the TB back to the proper spec, and it idled fine. Never got around to swapping in the HO set-up as the Jeep wasn't worth it.

Next time you feel like being condescending with your 'helpful' advice, make sure the thread isn't completely dead
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  #8  
Old November 30th, 2012, 16:53
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Re: XJ engine/transmission swap questions

It was brought back up because someone else responded to it.

You stated this:I really want to ditch as much Renix stuff as possible. Not only for the power gain, but to get rid of as many vacuum lines as I can.

And, I wasn't being condescending but suggesting better ways to deal with the high idle if all the other possibilities had been addressed, including spraying for vacuum leaks.. Very sorry you got your panties in a knot. I will try to do a complete forensic timeline of a complete thread from now on to eliminate this happening again.
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  #9  
Old November 30th, 2012, 17:00
Rush Power Systems Rush Power Systems is offline
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Re: XJ engine/transmission swap questions

why not just run mega-squirt and get rid of.....oh wait thread is dead? well never mind
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  #10  
Old November 30th, 2012, 17:02
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Re: XJ engine/transmission swap questions

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why not just run mega-squirt and get rid of.....oh wait thread is dead? well never mind
You shoulda done the forensic timeline before responding..........
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  #11  
Old November 30th, 2012, 17:13
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Re: XJ engine/transmission swap questions

Quote:
Originally Posted by cruiser54 View Post
It was brought back up because someone else responded to it.

You stated this:I really want to ditch as much Renix stuff as possible. Not only for the power gain, but to get rid of as many vacuum lines as I can.

And, I wasn't being condescending but suggesting better ways to deal with the high idle if all the other possibilities had been addressed, including spraying for vacuum leaks.. Very sorry you got your panties in a knot. I will try to do a complete forensic timeline of a complete thread from now on to eliminate this happening again.
I wanted to ditch the intake/exhaust manifolds to gain power, not the vacuum lines.

No need for a ' complete forensic timeline', the date is right up there in the corner of each post, so you could have just looked back two posts and seen it had been over a year and a half. Luckily I haven't been waiting here for that long just to get some basic advice from you on how to diagnose a high idle. Which, by the way, wasn't even the question I had asked, so the little input you offered was pretty much useless. Thanks for trying though, I'll give you a gold star for effort!
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  #12  
Old November 30th, 2012, 17:16
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Re: XJ engine/transmission swap questions

Believe me, you will never get another tidbit of advice from me from here on out. Too bad you didn't state things as they were and then clarified this much later regarding the manifolds. Communication and people skills are on the decline these days. You seem to know everything on your own. Unsubscribed.

Last edited by cruiser54; November 30th, 2012 at 17:21.
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  #13  
Old December 1st, 2012, 08:08
Rush Power Systems Rush Power Systems is offline
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Re: XJ engine/transmission swap questions

bump
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  #14  
Old December 1st, 2012, 10:41
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Re: XJ engine/transmission swap questions

Quote:
Originally Posted by cruiser54 View Post
You shoulda done the forensic timeline before responding..........

Better late than never!!!! LOL, but I hear that broken vacuum lines suck!!!
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  #15  
Old December 1st, 2012, 11:18
Rush Power Systems Rush Power Systems is offline
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Re: XJ engine/transmission swap questions

good one!
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