i've searched through the archives and found plenty of discussion about the results of compression tests, but not an actual procedure...
when running a compression test on a 97 XJ, is there a need to disable the EFI system? if so, is this via a fuse? which one? any other advice for someone running their first test on an XJ?
when running a compression test on a 97 XJ, is there a need to disable the EFI system? if so, is this via a fuse? which one? any other advice for someone running their first test on an XJ?