Originally Posted by amc49
Or one half of coil pack is bad. Look for cracks in coil outer casing, not a good sign........
I'd vote for this one over the other possibility. Usually you get a P0351 or 352 code (Ignition Coil Primary/ Secondary Circuit Malfunction) if any of the two outer coil connector wires break. Duff coils usually just give the cylinder misfire code in my experience.
Coil pigtail or coil itself cost about the same.