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  1. H

    Oil pressure sender 98 vs 99

    Can anyone explain why/how the oil pressure sender on the 98 is different from the 99? I was surprised to see they have different part #'s on Rock Auto. Comparing the wiring & connector diagrams across the FSMs, they appear to be identical. I mean, the thing just takes a pressure and...
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    OBDII Linking Error

    Helping a friend with his 99 XJ, has a CEL but is unable to read the codes because it keeps saying "Linking Error" when it tries to connect. The reader will power up no problem, just no communication. And the key on 3x trick doesn't seem to put codes on the odometer, but I've literally never...
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    Trouble with AW4 pump bushing

    This is going to be a decent length post....have more questions than answers. Jeep is a 99 XJ with an AW4. Quick rundown of events: jeep drove fine for 2 years (how long we've had it). One day wheeling on a steep-sh incline it started puking fluid and making a noise that sounded like the...
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    Need a peer review on AW4 clutches

    I just rebuilt the 32RH in my TJ so now I’m an expert. My XJ buddy just had his torque converter sound the death rattle and ate up the pump seal. Fluid came out really dark. Like so dark we thought it was motor oil initially. So anyway since I’m now an expert, he’s opted to have me...
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    No OBDII comm + PCM swap

    Have a 99 XJ that won't communicate on the OBDII port. Code reader powers up, goes through its cycle, and then says it won't communicate. Did all the standard troubleshooting steps but could not make it talk. Then we put in a computer from a 2000 XJ just to see, and sure enough it...
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    Understanding the overhead console

    Full disclosure, I'm a TJ guy but I'm also the "electrical expert" in my group (which is incredibly scary) so when the XJ has electrical trouble, it's up to me to solve it. What we've got is a 1999 XJ that's got a parasitic drain of about 130mA, which I've isolated to fuse 16 in the PDC...
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