[KingSalmon911SC]

Steve;

Carbon, burn marks, can build up on the electrodes inside the distributor cap. This is caused by the high voltage"arc" between the rotor and dist. cap. Additionally, in many cases, electrical dust gets deposited inside the dist. cap between electrodes - likes to deposit in minute cracks in the cap. Anyway, when there is a buildup of carbon on an dist cap electrodes, that increases resistance to fire that corresponding cylinder so the "arc" following the path of least resistance, occasionally arcs to a nearby cylinder instead; hence, an intermittent miss.

Make sure your cap is clean inside and dry. Same for the rotor and that the rotor leading edge is clean & uniform in electrode curvature, and is making good clean contact with the coil electrode. When in doubt, replace as they are the cheapest and most abused parts of the system.

Lastly, you mentioned you replaced the coil. Sometimes a coil can have a short or open in the secondary windings - showing up only after the coil warms up from engine heat; thus, expanding the windings; hence a intermittent short or open occurs.

If you have access to a engine analyzer (scope), it would point out either/both of the conditions above; as well as, spark plug wire arcing, coil wire arcing.

Good Luck, you'll find it!

Richard