Found #2 and #7 with excessive misfires . When removing #2 plug to check compression found spark plug came out with only 2 turns of socket rotation. Could not install compression tester will need to try and chase threads in head.
Thread chase #2 cylinder spark plug hole
Dennis M. gave our service a 5 star review on 7/13/2023
Scanned for codes, P0621 checked and found low voltage at battery. Full fielded alternator no output checked for signals to alternator. needs alternator replacement