Narrowed down the Code 12 to performing the compression test with the coil disconnected. I cleared the codes and have no codes showing now.
As stated above, 170-175 compression on all cylinders and all grounds that I can find appear to be good and clean.
While the engine was running, I started pulling plug wires and when I removed the #3 wire it made no difference in performance. I swapped plug wires with a known good plug wire and that made no difference, so I swapped plugs with a properly gaped and known good plug and that too made no difference. I tested the spark and it's getting a strong spark to the plug.
Next I started pulling injector wires/clips and when I got to the #3 it made no difference in running, so I assume it's the injector. I ran an ohm meter across the injector itself and it's within spec from the FSM. I also tested the plug itself and it's getting 12 volts with the ignition on.
When I put a long extension on the #3 injector it has a faster and more "tingy" click to it than the other injectors have? So I know it's at least clicking, but not at the same speed nor sounds, although close, than the others.
Are there any more tests that I can do prior to taking the intake off and swapping injectors? I'll just send them all out for cleaning and flow matching when I do. However, has anyone experienced this before and had it not be the injector? I know the splices in the factory harness can go bad, but not sure that is my problem as I have power to the injector and the other 3 work fine.
All four cylinders have spark and air, but it appears #3 doesn't have fuel
Sorry for the