What is the correct procedure for doing a compression test on an 8.1L EFI engine? On an engine with a distributor you would disconnect the high voltage center wire at the distributor and ground it. Since this EFI engine has coils for each cylinder, should I just disconnect the spark plug wires and let them hang loose, remove all plugs, open the intake by putting the throttle up all the way, and proceed to test the compression on each cylinder?? Should the fuel valve be closed also? I can not find a procedure online.
Thanks,
Erich
Thanks,
Erich