My old Honda ran fine until I left my lights on one day while at work. Got my brother to jump me and it died about 8km down the road(note. it was like -17C). Engine cranked, but wouldn't start after that. towed it, charged it, no start. We replaced the Main relay, spark plugs, Distributer cap and Rotor; then it ran for a week and died. We found the no spark and traced it to the ignition coil and installed a replacement. A week later it died again. No spark at plugs, or coil, took off dis cap and leads from the coil to test resistances. There was some build up in the cap, it looked like dust, but there wasn't very much. We put it back together and it started right back up?
What could cause this?

 

Are you using cheap Chinese distributors?

 

Nope, Honda parts sourced from a local Lordco.

 

DPFI or MPFI? Stock engine/ECU? Is the wiring chopped up any?