Right my coil packs all 3 were brand new 2 years ago and covered only 2k miles, last Thursday my engine light came on after it had been running rough..... stalling at junctions etc rough running etc I managed to get it going and get home, connected up tuneecu and got coil pack codes for cylinder 1 and 3 now I found that strange, removed coil packs and tested with multimeter and they all read same on top and bottom circuits roughly no open circuits at all now that then took me to plugs I removed them and they seem ok no unusual wear or colours do you think 2k mile old spark plugs could be cause? Regards Carl.
Have you checked out the main power relay side of the circuit and made sure you’re getting a full 12V to all 3 coils?
