[FED 387]

Are the **new** plug wires following the same routing path that the **old** wires did---

have you installed or rerouted any sensitive wiring since the old wires were replaced???

are all wires the same length as the wires they replaced???

are the boots OK do they have carbon tracking inside them???

MSD suggests that 40-50 OHMS per wire foot COLD is their recommended number----

is it the same cylinder or does it move around???

have you thoroughly checked the distributor/cap rotor/wiring and coil ---how old is the coil do you have a **powerful** enough coil for the application

do you have a MSD box and has it been checked out-- did you try a different box

was the coil and or coil wire replaced??

have you checked for a cracked porcelain or other possible defect of each spark plug??


what else was changed??? If you have the **old stuff** put it back in see if the miss goes away

does it happen on humid days or dry days-- cool days or hot days or does it happen almost any time??? low RPM or High RPM ??


FED 387