Taters, what was the problem with the computer? I am having the exact problem and I think that is the culprit. Would it just be easier to buy another computer?
Had the same issue. I am new to Jeeps, being an old Ford guy so I made a dumb mistake. I have just finished working on my XJ doing lots of mods and maintenance. One of the things I did was remove the interior to fix some holes on the floor and bed line it. During this procedure I removed the seat belts, no big deal right? Put everything back together, drove it a week or so, then one day, boom; she shuts down. No spark, no start. I troubleshoot everything, got the familiar CPS, coil, etc. found that the ASD relay 30A fuse is blown. The culprit? There is a plastic bracket behind the transfer case that holds the O2 sensor. It is held to the SEAT BELT bolt with a speed nut! When I removed the seat belts, I inadvertently disconnected this bracket. The O2 sensor wires were draped over the slip yoke and the insulation had worn through causing a short and blowing the fuse. Fixed the wires, put the bracket back in place, replaced the fuse and hit the road.
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