Topic: What would you all do in this situation?

[bammerman]

To be honest i am not sure I just know it is a 4.0 inline 6 with MPI system, AX15 and the Tcase to match.

[Jeffy]

isn't that a Renix?

4.0L HO MPFI started in 1991, so yes.

[sharpxmen]

4.0L HO MPFI started in 1991, so yes.

was more rhetorical

1987-1990 4.0 L, 242 CID AMC 242 I6, 173 hp with Renix fuel injection system
1991-1996 4.0 L, 242 CID AMC 242 "High Output" I6, 190 hp (142 kW) with Chrysler fuel injection system

i mean, ... if you go thru the trouble

[Jeffy]

was more rhetorical

1987-1990 4.0 L, 242 CID AMC 242 I6, 173 hp with Renix fuel injection system
1991-1996 4.0 L, 242 CID AMC 242 "High Output" I6, 190 hp (142 kW) with Chrysler fuel injection system

i mean, ... if you go thru the trouble

I wouldn't bother with a Renix either.

[bammerman]

Now the question is since I am getting everything - complete swap, how can i go about upgrading to the chrysler?  Are we talking another 1k into the injection system?

[Jesse-James]

you look for another donor, honestly.

[bammerman]

That is the problem here in Nevada, everyone and their grandmother drives a Jeep/4runner/etc... Lake Tahoe a 4wd is needed so finding this donor was a chance.  All I want is a 6cyl really.  I don't plan on crawling this one really, more of a daily driver and maybe hit a trail once and awhile but nothing heavy.  I want a CJ6-7 for crawling.

[Jeffy]

That is the problem here in Nevada, everyone and their grandmother drives a Jeep/4runner/etc... Lake Tahoe a 4wd is needed so finding this donor was a chance.  All I want is a 6cyl really.  I don't plan on crawling this one really, more of a daily driver and maybe hit a trail once and awhile but nothing heavy.  I want a CJ6-7 for crawling.

For crawling it doesn't really matter what engine you have.  With proper gearing anything can crawl.  If you want a daily driver then get a good engine.  The Renix was only used from 1987-1990 and was really only a band-aid to give Chrysler time to bring out the AMC HO 4.0L.  The HO 4.0L was used from 1991 to 2006.  There's a reason why it was used for such a long time.  It was that good.  The only thing that killed it was the ever increasing emission standard and the fact that the Wrangler was the only Jeep using that engine.

[bammerman]

will the wireharness or wireloom from my 4banger fit on the one off the 87 cherokee?  I have the one off the cherokee but it is a rats nest would rather use mine but not sure if it will plug into a ecu from a pcu or if there is a adapter for it. Also should I snag the fuse box out of the donor jeep or will mine work?

[Jeffy]

will the wireharness or wireloom from my 4banger fit on the one off the 87 cherokee?  I have the one off the cherokee but it is a rats nest would rather use mine but not sure if it will plug into a ecu from a pcu or if there is a adapter for it. Also should I snag the fuse box out of the donor jeep or will mine work?

You will have to check the pin-out on both harnesses.  They should be similar but you will want to double check.

Still going to go forward with that Renix 4.0L huh?

[sharpxmen]

will the wireharness or wireloom from my 4banger fit on the one off the 87 cherokee?  I have the one off the cherokee but it is a rats nest would rather use mine but not sure if it will plug into a ecu from a pcu or if there is a adapter for it. Also should I snag the fuse box out of the donor jeep or will mine work?

first off yours is a TBI and the Renix is an MPFI so the harness is not even close, secondly the ECUs are different (unlike the 91-95 where the basis is the same between 4 and 6 cylinders, but even there the 4 and 6 harnesses are different - that is the missing 2 injectors and the length)

your only hope is that the in-cab harness connector(s) will mate with the engine bay harness connector (if they are split that way) and that the pinouts are compatible

[bammerman]

Still going to go forward with that Renix 4.0L huh?

Yeah it is my only option for now, and I might as well learn doing this with a crappy motor than a really good one.  At least my motor mounts will be there for if I want or find a newer engine.

[YJmechanic]

i have to agree that the renix is problematic at best.  u also might want to watch out if ur in that mid 80's range for a ba10 peoget tranny cause it is the worst thing that ever landed in the xj's.  i would rather have an ax5 behind a big block than a ba10 behind a 3cyl metro motor.  the only thing with the renix is the common parts are not available (tb upgrades and such), they are more problematic, and the power just isnt there.  i know the factory numbers make them look close but realistically the ho is way more powerful.  just know what ur getting into,  lots of places are shipping motors and such with free freight because of lack of business.  400 for a renix drivetrain that is worn out is not really a good deal if you ask me

[bammerman]

400 for a renix drivetrain that is worn out is not really a good deal if you ask me

Well it was 400 for everything.  The entire rig.  Just had to give rolling chaise back.  I guess I am looking at it this way, it is going to cost me about 1k to have it pulled, rebuilt, and installed.  I cannot do the work myself due to lack of knowledge and shop, etc... I just need a running engine until I make my move to Denver for a new job.  Hopefully I can find a better engine out there when I start making more money and praying not everyone and their grandmother drives a wrangler so I can find a good donor vehicle. I don't know what it is about lake Tahoe but they take all the good shit.

[Jeffy]

Well it was 400 for everything.  The entire rig.  Just had to give rolling chaise back.  I guess I am looking at it this way, it is going to cost me about 1k to have it pulled, rebuilt, and installed.  I cannot do the work myself due to lack of knowledge and shop, etc... I just need a running engine until I make my move to Denver for a new job.  Hopefully I can find a better engine out there when I start making more money and praying not everyone and their grandmother drives a wrangler so I can find a good donor vehicle. I don't know what it is about lake Tahoe but they take all the good Jell-O.

If you're going to have to pay a shop for parts and labor, why not look for a 4.0L that has fewer miles and doesn't need all that work?  Then you won't have to farm out jobs.