Hi all
Going to share as much info as possible in case something jumps out.
New XJ owner, bought 4 weeks ago. Owner said he had no issues with engine, only the body. I believe him as he let me drive it up and down the highway and around town. Seemed to run great. Had it for two weeks and then...
My '00 XJ is having similar issues that you described, and after reading this whole thread I am inclined to try your fix first before I move on to the bigger money things like the fuel pump. I already tried replacing all the spark plugs but that didn't help.
So the TL;DR summary here was a...