misfire is on my damn nerves
Nov 21, 2009 | 11:53 AM
#11
Probably a bad spark plug, that will give you the symptoms you described. A misfire while raining (or even on a humid day) is a classic symptom of a failing ignition component, and the fact that it happened right after the header install, and the wires are new, leads me to believe that a plug probably has a hairline crack in the porcelain. (or carbon tracking like AKlowriderZ71 mentioned)
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