05 F150 4.6 no spark on 2 and 5 help!
12-17-2013, 04:08 PM
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05 F150 4.6 no spark on 2 and 5 help!
Hello, I have an 05 with a 4.6 and number 2 and 5 are dead. I've tried swapping coils, I tried a new coil, new plugs. Still no fire on 2 or 5. I tested the coil power wires while it's running and it has a steady 14.3 volts on one side, when I tested a coil power wire on a cylinder that I know is firing it seems to jump from about 13-14.3, as I would expect because it's firing on and off right? What does this mean? Bad PCM? Any info would be greatly appreciated.
