Im trying to figure out whats wrong with the 4.7 in my dakota. Its been acting like theres a miss. I pulled the codes with the OBDII and it came up with the code for Injetor coil "F" primary and secondary circuit malfunction. I'm not sure which coil is "F". I assumed they letters coincided with the number of each cylinder. So i ohmed out cylinder 6. It tested fine. So i checked the remaining 7. They also checked out fine. Any ideas, or has anyone ran into this before????