[12Ounce]

Huh! A compression test is meaningful if done on all cylinders ... with all plugs removed ... and with the throttle plate blocked/held open.

Did you try the cable-end swap I suggested?

If so, and the compression test turns nothing up ... it is indeed time to turn some attention to the injectors. Remove them all, (clean injector bases first, to keep crap from falling into combustion chamber) but keep up with which injector goes to which cylinder. DO NOT SOAK THE INJECTOR BODIES, but give each injector-inlet a sideways blast with aerosol brake cleaner. Mount all injectors upright on a work bench and drop a bit of clean motor oil, or injector cleaner, into each injector inlet ... let stand for a few hours. Reinstall injectors but swap locations .... bank #1 to bank #2. Restart and read new code.