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Speedo is showing just under 70 and Waze is showing 68. Keep in mind this is a CJ so there really isn't a tick for 68 mph. Do you think my RPMs are too high or too low? I suspect they are a little too high given my 4.56 gearing. I'm trying to see where the sweet spot is for MPG and also trying...

Just filled up a will run another tank (just me driving) and see what mpg I get. Yes the speedo is pretty accurate vs gps. What rpms are you running on the highway? I’m around 2520 at 68 mph

Thanks all. Will do some highway runs at a lower speed and see if I can find the sweet spot

I'm trying to determine realistic MPG with a 4.0/AW4 running 33x12.5 and 4.56 gearing. This combo is actually in a CJ but since this came from an XJ I thought it would be best to check here. My son has been complaining about poor gas mileage (10-12) but I'm trying to see if anything can be done...

I hate threads that are left open so I wanted to close this up. The flange is 2.75”. Napa/Walker 41725 is the collector I ended up using (2.75 flange to 2.25). I cut off the slip connection and turned the pipe to clear the bell housing with a few 9 degree pie cuts. About $40 in material, couple...

Did a 4.0 swap into a CJ from a 94 XJ. The project is pretty much buttoned up but I need to build a down pipe from the exhaust manifold. I briefly thought about cutting and using the pipe from the XJ but it has too many bends to really get a good transition to the cat and out the back (running...

Hoping someone that knows more than me can chime in and let me know if I'm going about this correctly. I'm swapping in a 95 XJ 4.0/AW4 into a 85 CJ7 with a Dana 300 tc. All the wiring is complete except for the brake light switch for the AW4. When I started this swap I pulled the engine side...

Figured it out. When thinning the wiring for the swap I didn't splice the ecu +/- after I clipped them from the bulkhead connector. Wires spliced and it's running! Just need to finish the brake wiring for the AW4 and figure out the shift linkage. Thanks all. I'm sure I'll be back.

86 has power when the ignition is in the run position. 85 shows continuity to the battery (-). Are the grounds for the PDC the larger black/white wires that go to the engine block next to the coil?

When does 86 get 12v? When in the run position? Will check the ground (i suspect this may be the issue since it was switching a few weeks ago).

So I bypassed the relay 87 to 30 and the fuel pump kicked on and the truck fired up. So whatever tells the relay to switch on isn't doing its job (also swapped in different relay so I assume the relay is good). Any thoughts?

I'm swapping a 4.0/aw4 from a 95xj into a 85 cj. I pulled the PDC and engine/trans ecu from the xj and wired in the ignition/crank/run from the CJ to the XJ. I was planning on using the fuel pump wire from the PDC but I'm not getting power. Not ideal, but the project has been moving around in...

I'm doing a 4.0/AW4 swap and pulled the entire wiring harness (engine side) plus the TCU, PCM, and engine side main fuse panel. I'm finally getting around to the wiring and before I start thinning the XJ and marrying it to the CJ harness I was wonder what these connecters are. There are 4...

Thank you!

New user here. I actually learned to drive on a first generation XJ but haven't owned on in years. I'm building a CJ7 for the kids and powering it with a 4.0/aw4 from a 95 XJ. I pulled the entire side engine harness plus the trans ecu. I have limited storage space so I parted the XJ quickly to...