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  1. M

    4.2L in an XJ?

    Just thought I'd give a quick update. Got the engine in - runs great. The build went suprisingly easy. Almost everything bolted right up. If anyone is interested (let me know) I can put together something that shows all the weird stuff. It seems to have good power (not much to compare too...
  2. M

    Grand Cherokee won't start

    Update - was worried about timing chain so he pulled the cover. Crank and cam still lined up and chain looks good. I'm thinking the code 41 was induced from letting the battery run dead from cranking.
  3. M

    Grand Cherokee won't start

    - Timing looks to be on - crank position sensor checks out ok What's left? Computer? Any other thoughts would be much appreciated - we are about to throw in the towel.
  4. M

    Grand Cherokee won't start

    Tried starting fluid - no luck. Opened the line in the fuel rail (with a fuel pressure gauge) appeared to put out a lot of gas. Tank was down to ~1/8 when this happened -> put a few gallons back in and still nothing. Had been running fine earlier in the day. Other notes - getting...
  5. M

    Grand Cherokee won't start

    My friend has a '93 grand cherokee that won't start. It is a 4.0 with an automatic. It is getting spark at the coil and at the plugs. Also it has ~40 psi of fuel pressure at the rail and it is pumping gas. Getting a '41' code. Any thoughts?
  6. M

    WJ budget boost

    thanks for the inputs - has anyone tried rusty's shocks before?
  7. M

    WJ budget boost

    Looking into a 2" poly spacer lift for my grand cherokee. Any recommendations? Right now I am looking at the Rusty's kit and the rough country kit - biggest difference is the shocks. Anyone have any experience with rusty's or rough country (Heckethorn 8000) shocks? I've never tried either.
  8. M

    4.2L in an XJ?

    Well, I still think I am going for it. What do I have to loose, other than a weekends worth of freezing in the garage... As far as the emmissions visual inspection goes, I agree with bobdog. I would be really inpressed if someone could tell the age of the metal in the block by looking at the...
  9. M

    4.2L in an XJ?

    Why do you see this as a downgrade? - honestly just trying to understand. When the swap is done I will basically only be using the 4.2L block (and guts). It will have a 4.0L head, 4.0L intake/exhaust, and the same fuel injection/control system. To me, it seems that I will basically be...
  10. M

    4.2L in an XJ?

    Thanks for the responses on this - I have been checking a bunch of other web sites as well and this definently seems do-able. So with that in mind I am going for it - If anyone remembers an issue post up. Thanks
  11. M

    4.2L in an XJ?

    Main reason for swap - dying 4.0L vs. fresh and healthy 4.2L. Rebuild and stroker kit for the 4.0L would be sweet... if I had the funding. I am just looking for a cheaper alternative. The swap would be a fresh 4.2L block (and guts), fresh 4.0L head, and all the cherokee fuel injection (at...
  12. M

    4.2L in an XJ?

    Background - I have an XJ with a tired 4.0L (305,000 miles) and I am looking for replacement options. I also have access to a freshly rebuilt 4.2L from a CJ. So is it possible to put the 4.2L in my cherokee? I am thinking about using it basically as a short block for my 4.0. I have read a...
  13. M

    4.0 compatibility

    I see the max torque at 2400 RPM being a good for wheelin' - but how about for on-road driving - basically, what would you guys vote for a daily driver? Honestly the only cherokees I've driven have been my 2 88's and a 90. So I don't have anything to compare to - how much better are the HO's?
  14. M

    4.0 compatibility

    Dave - thanks for the input - this is great information. I really appreciate the help. Well, I'm off motor hunting.
  15. M

    4.0 compatibility

    Thanks for the responses. So far it looks like anything '87 and up will interchange. So what are the major differences? '91 and up they went to the HO version (177 to 190 hp). What changed in motor? Dave, you mentioned a cam change, is that the only difference? To give some background on...
  16. M

    4.0 compatibility

    What year's of the 4.0L are interchangeable? This is what I thought: - 1987 to 1990 - 1991 to 1996 - 1997 to 2001 Is this right? Were there any major differences between the XJ's, ZJ's, YJ's, TJ's? Thanks
  17. M

    XJ Transfer Cases

    cool - thanks for the input Anyone have experience with the NP 242? Any issues or things to look out for? I like the idea of the AWD mode for a driver.
  18. M

    XJ Transfer Cases

    Does anyone know if NP231 and NP242 Transfer cases are interchangeable (behind an AW4)? Do they have the same input spline count/length, mounting bolt pattern, etc?
  19. M

    Locker help snap an axle?

    What does that even have to do with this question??? Sure those are really cool things to put on your resume when you try to get a job, but you didn't answer anything. Did you do any kind of comparitive analysis of impact loading versus static loading for the specimens.... Just trying to...
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