300 i6 4.9 has misfire cyl #6 but has spark!
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#8
Senior Member
Did you check compression? Sorry I'm more knowable on the 4.6 and 5.4. Could the spark just be week? Try changing the problem cyclenders plug with a good cyclenders plug and see if the misfire moves.
#9
ive done changed plugs. What i did was, I unplugged one wire at a time to each cylinder. when i pulled the 6th wire from cylinder 6,,,it didnt change, just kept missing. but the other cylinder would miss when i unplugged wires