has spark and fuel, wont start.

Sounds familiar to a problem I had. I took the mopar electronic ignition out and replaced it with a Accel ignition system. I had to discard the ballast. The car would run sometimes but then again it wouldn't crank. I had fire at the plugs when I checked it while turning it over but it would not crank or stay running. I did some head scratching ...... so I tied the blue and brown wires together, hooked that to the hot for the ignition system, and the car fired immediately. Been driving like that for over three yrs now with no problems.