Hey, all...Having some XJ issues!
I was driving along at highway speeds and lost power when attempting to accelerate up an incline (engine started skipping, and then I lost power everything and the engine cut out). Cranked but would not start again for about 15 minutes. It then started up fine and was running well. I proceeded to the nearest exit and took a break (was assuming an overheating issue). Then I got back on the highway and had the same problem within a mile.
Since then, it cranks normally but will not start.
Replaced: Spark plugs, cap, rotor, CPS
Tested: Injectors
Going to test: Compression, fuel pressure (the pump works, I just don't know if it is outputting the necessary pressure)
Any ideas about what it could be? My latest thought was that it could be the ECU, but I really have no idea.
Thanks!

 

Are you getting any spark at the sparkplugs? If not it could possibly your coil or even the camshaft position sensor. A camshaft position ssensor going out will cause the same issues as a crankshaft position sensor (cps) going out. Id also check the fuel pressure to ensure you are getting the correct fuel pressure.

 

what he said! short, sweet and straight to the point