Manny, you are AWESOME! After replacing all my ignition components I still had a random misfire, you nailed it! It was the O2 sensor. Thank you!!!

My respect for helping your son

Have code faults for #1 misfire, fuel injector 1 circuit open, and Bank #1 lean. There is a slight rough idle, but no misfire perceived, and it runs fine under load and high speed. Doesn't burn oil. Gets 15mpg combined mileage. Ran fine when I got it 64,000 miles. Now it has 110,000 miles. It has had this issue for about 10,000 miles. Not getting worse, but so far plugs and coils and cleaning intake hasn't corrected it. I checked and cleaned Injector and Coils wiring connections and they look good too. #1 Injector plug had some oil in it, somehow. Cleaned it very well with first brake cleaner, then electronics cleaner. Let it dry and reassembled. Can bad Injector o-ring cause this? I already ruled out spark plug, coils, valves, and did intake cleaning. I have not checked orings and the wiring from #1 Injector to the computer control. And don't really know how to. Any tips on checking Injector and its wiring and control while it's still in the head? Thanks!

O2 Sensors could be the gas cap isn’t screwed on tight.

Firing order pointed out is backwards

Thang I’ll try tomorrow my car is doing the same

Thankssss man it helps !!

Up stream 02 sensor.

Did the engine make a loud ticking noise when it was missfireing ?

Thanks

I try now

Thank you so much Manny.

The name please 🥺