Mode 6 scan tool fun w/ the v10, random misfire
Felt a random misfire the other day on the Excursion after a 200 mile tow. Misfire could be induced under light load. Didnt matter if engine was warm or cold. Problem with 10 cylinders is that how do u determine which one or more of them is the suspect cylinder(s)?
Truck showed no codes and had no codes pending so no Check engine light was on.
If your scan tool has mode 6 it will give you a misfire count for each cylinder. In mode 6 I them went into $53. It listed each cylinder and they all had 0 misfires except cylinder #6. It was below the threshold to trip the CEL on the dash but had numerous misfires.
Ran to the parts store and got anew coil. Problem fixed.
I have encountered this problem before, last time two coils went out a the same time. Just thought I would share incase someone has problem similar. May save some diagnostic time and $$.
Truck showed no codes and had no codes pending so no Check engine light was on.
If your scan tool has mode 6 it will give you a misfire count for each cylinder. In mode 6 I them went into $53. It listed each cylinder and they all had 0 misfires except cylinder #6. It was below the threshold to trip the CEL on the dash but had numerous misfires.
Ran to the parts store and got anew coil. Problem fixed.
I have encountered this problem before, last time two coils went out a the same time. Just thought I would share incase someone has problem similar. May save some diagnostic time and $$.
