OK so after the cylinder balance test, I got every cylinder worked, or as the guide says "More specifically, this test result lets you know that the fuel injector, spark plug, spark plug wire, Coil Pack is OK for that specific cylinder."
It implied the next step is to check the ICM, but doesn't say how, so I got a much younger one used and nothing changed. A case study had the ground as a problem but not sure how to test that . Then test compression I guess?
I feel like it's electrical problem but I don't have a vacuum tester or compression tester anyway.
