sounds like it's either running rich or has alot of carbon build up. if the cars running then i think the dizzy is ok lol. but you can hook a volt meter to the positive and negative terminals on the coil and fire it over real quick to see what kind of voltage/amps your getting.
most likely it has something too do with the o2 sensor and it's telling the ECU to run richer.
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CRAWFORD BUILT
Gainesville Crew Member #1
DC Crew Member #23