Wednesday, April 10th, 2013 AT 5:09 AM
I literally just rebuilt my 4.9 300 and it ran great all day until I was heading home. I checked for spark on all plug wires and numbers 1, 4, 5, and 6 have intermittent spark. Ignition module, cool, cap, rotor, plugs and wires are all brand new along with the pickup in the dist. Any ideas?