I have two dead holes.

Question

I am not getting a check engine light. But here is my problem....i have two coils firing and two not. It isnt coils nor nor either of the sensors. Crank and cam sensors have both been changed. No chaffing or short in wires. I inspected the wires from the coils to the ECM. All good. Im confused.

Answer 1

What cylinder are not firing? There are several ways to confirm there is no igntion from the coil , one of them is use a igntion analyzer, check power to the coil , check igntion signal to the igntion coil.

 In order for a igntion coil to work the igntion coil has to have battery positive to one of terminal, then there is a ground, and a igntion signal.those area has to be checked.