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General Forums => The Mess Hall => Topic started by: bammerman on October 03, 2010, 04:46:54 PM
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I see that the 4.0 wasn't introduced until 1991. I have a rebuilt 1988 but want to plug and play instead of using the 88 wire harness and computer.
is there a wire loom from block with computer to run the 6 cyl with the renix injector system? Is it possible to get a wire harness that will work without having to rewire everything with the 88 harness? Maybe use a 4.2 harness to run the renix injectors? Any ideas or advice is appreciated.
can we use the same fuse box and guages? can we hook a 6 to a 4 fuse block
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I see that the 4.0 wasn't introduced until 1991. I have a rebuilt 1988 but want to plug and play instead of using the 88 wire harness and computer.
is there a wire loom from block with computer to run the 6 cyl with the renix injector system? Is it possible to get a wire harness that will work without having to rewire everything with the 88 harness? Maybe use a 4.2 harness to run the renix injectors? Any ideas or advice is appreciated.
can we use the same fuse box and guages? can we hook a 6 to a 4 fuse block
you can install the distributor, wire harness, crank sensor, map sensor, AIT, coolant temp sensor and PCM from a 4.0 6 cylinder and run it that way (add injectors to that list too). not sure about the fuse box, if your's is a 91+ then you should be able to connect the engine bay harness of a 4.0 to your in-cab harness. I'm not sure if the flywheel crank teeth are the same, i think there are 3 groups of 4 equally spaced (120 deg) on the 4.0 flywheel (91-95)
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correct me if I'm wrong but the 4.2L was carb no?
also the renix isn't at all the same wiring as the 4.0L
your going to have to cut and past i think
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Mine is a 90 yj and the donor is a 88 xj
blown 2.5 going to 4.0 (not the 4.2)
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Mine is a 90 yj and the donor is a 88 xj
blown 2.5 going to 4.0 (not the 4.2)
ya you asked if you could use a 4.2L harness I think there carb.
is your 90yj multiport or even tbi?
does the 88xj have a donor trans to? because I don't think the trans will bolt up to the 4.0l if your swapping just the eng
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TBI
I have a newly built 4.0, Ax15, and NP231 J
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I am mainly just wondering what harness I can get that will work with my existing fuse block. I not worried about price. Just only have 4 days to finish this project before I move to Denver. Not really wanting to rewire the XJ computer and harness to what I have now.
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holy crap dude you expect to swap the eng and completely wire it up in 4 days? good luck with that.
my buddy did a complete swap going from a 95 yj 2.5L to a 4.0L with a 95 yj donor vehicle "everything complete. and if I remember correctly the fire wall pin out was different and he swapped all harnesses and fuse boxes and all under hood to make it all work. also the tach needs to be the 6cylinder one or it will read wrong. It's not just as plug and play as it should be. esp being tbi I have no idea how that would work going to a 4.0L multi port renix witch I don't think was ever offered in a yj
anything is possible but 4 days it very short time line to get this swap done.
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We are mocking up mounts today. Dry fitting drive train as well. Our problem is the wiring. That is what we are running into. Got a XJ wiring diagram just cant find a 90 YJ one that will print out ok.
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We are mocking up mounts today. Dry fitting drive train as well. Our problem is the wiring. That is what we are running into. Got a XJ wiring diagram just cant find a 90 YJ one that will print out ok.
good luck to ya. not sure were you would get tbi wiring diagrams.. You may have to use a test light and meter
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Use the later 4.0 and a painless wiring harness and standalone pcm will make wiring simple
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www.hotwireauto.com
Call Tony...
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http://www.summitracing.com/parts/PRF-10111/
is this the painless your talking about?? if so the price made pains in my chest lol
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There is no simply plug and play harness from another vehicle, it's gonna have to be a custom job either by you or a vendor.
By far the simplest thing to do, and more bang for your buck, would be to find a GM v8 with a carb, auto, and 231c.
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There is no simply plug and play harness from another vehicle, it's gonna have to be a custom job either by you or a vendor.
By far the simplest thing to do, and more bang for your buck, would be to find a GM v8 with a carb, auto, and 231c.
he already bought the engine and transmission http://4bangerjp.com/forums/index.php/topic,8146.msg64713.html#msg64713
at this point the cheapest and fastest way to go is to mate the XJ harness he has to his YJ and hope it fires up.
or imo better get a YJ 91-95 full harness, PCM, intake manifold with throttle body and some of the engine accessories (distributor, flywheel if it's different and the PCM coolant temp sensor)
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he already bought the engine and transmission http://4bangerjp.com/forums/index.php/topic,8146.msg64713.html#msg64713
at this point the cheapest and fastest way to go is to mate the XJ harness he has to his YJ and hope it fires up.
or imo better get a YJ 91-95 full harness, PCM, intake manifold with throttle body and some of the engine accessories (distributor, flywheel if it's different and the PCM coolant temp sensor)
+1 but for fastest way I would op for xj harness mate to the yj and hope it fires sourcing the rest in 4 days may be tough and costly when you already have the xj renix stuff my buddy has a renix retro in his yj but he bough it like that.
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Whether you have smog inspection or not your building a orphan..
Its federally illegal to do a 88 in a 1991 because your changing
the emissions the wrong direction.
Any body who has ever been jacked up by the smog police wont touch it,
should you ever want to sell, and if someone buys it and does not know it
or even if they do a subsequent buyer could come after you if he fails smog.
Happened to me a couple years ago... Cost me weeks and I had to pay to put it right...
Guy who bought it from me (As a parts truck) sold it to someone else, they lived in a
inspection area. I even had a as-is bill of sale, but I got nailed because the buyer
"did not speak english" so "did not understand the paperwork". It was an assembled truck 79
GMC cab and Bed on a 1981 frame. (I did not know the frame was a 1981 thought
it matched the truck)... Arg.. So Washington identified it as a 1981 instead of a 1979 and changed
the title....
From then on it was a death spiral the buyer took me to court and won even though
I bought the truck running from someone else that guy and his brother claimed
I bought he parts un-assembled....
Dave
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Sometimes it is good to live in The Netherlands...we dont sue that much.
Whether you have smog inspection or not your building a orphan..
Its federally illegal to do a 88 in a 1991 because your changing
the emissions the wrong direction.
Any body who has ever been jacked up by the smog police wont touch it,
should you ever want to sell, and if someone buys it and does not know it
or even if they do a subsequent buyer could come after you if he fails smog.
Happened to me a couple years ago... Cost me weeks and I had to pay to put it right...
Guy who bought it from me (As a parts truck) sold it to someone else, they lived in a
inspection area. I even had a as-is bill of sale, but I got nailed because the buyer
"did not speak english" so "did not understand the paperwork". It was an assembled truck 79
GMC cab and Bed on a 1981 frame. (I did not know the frame was a 1981 thought
it matched the truck)... Arg.. So Washington identified it as a 1981 instead of a 1979 and changed
the title....
From then on it was a death spiral the buyer took me to court and won even though
I bought the truck running from someone else that guy and his brother claimed
I bought he parts un-assembled....
Dave
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We are trying to mate the harness now. It is a brand new engine so I can going to put a cat on there to see if it even puffs anything. I do still have all the emissions stuff off of the XJ to put on.
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Well he bo-yah! me. Now I have a brand new drive train and a non moving jeep. Not being mechanically inclined I am not sure what to do. Sell the thing to someone in Denver? Anyone live in Denver that knows this shot? Ya he mounted. The engine in the wrong Damn door inch off
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if you have the original harness there's not that much work to get it going, just hook up the engine side harness and jump the wires that go in the cab (there should be about 4 wires that need to be connected, +12 switched, ignition, crank and maybe a ground or 2) - you can even connect them straight to the battery to start it. At this point you shouldn't care much for the gauges, you can get a set of mechanical ones for something like $20 with a mounting pod (oil pressure, water temperature and voltage) - just to get it moving. I hate to say it but we did warn you to get a YJ engine or at least the full YJ harness to make your life easier.
Don't give up now, you're really close - it's really not that big of a deal. I don't have a manual for the XJ renix otherwise i would have looked to tell you what wires to connect where but i think you do so map out what needs to be connected at a minimum.
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Well he. mounted the frame an inch off. Now I have to remove engine etc to.remoubt it. Think I will look for a 92+ engine and get frame so I don't have to cut. Guess a learning. Esp.
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Well he. mounted the frame an inch off. Now I have to remove engine etc to.remoubt it. Think I will look for a 92+ engine and get frame so I don't have to cut. Guess a learning. Esp.
what do you mean an inch off (up/down or forw/backw)?
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when you say you get a 92+ engine so you don't cut the frame - aren't the blocks the same, maybe you just need the motor mounts off a 92+
or you could modify the ones you have, 1'' is not that much really, you should have enough room to leave it like that, where does it hit? (or why can't you make it work?)
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Are you missing the spacer in the motor mount on the passenger side? There is a secondary bit in there...
It looks right without it but it does not work....
Dave
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It's an inch to far back. The shifted hitting. Thinking of just selling this engine and get a 5.0 if it will mate somehow to a ax15 with an adapter
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New question. If I was to get a computer, wireharness, fuse block, injectors, etc... out of a 90 4.0 will it mount up to the 88 that I already have?
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YOu need the intake manifold and exhaust manifold to mount the injectors and the O2...?
Thinking...
Dave