[Steve Jones]

John,

I am running the exact same ignition as you, right down to the ProMaster coil and I haven't had any problems with the system. I have read several negative posts over the years concerning the Unilite distributer and module. I think most of the problems are a result of poor installation or improper usage. I don't think the Unilite module is very robust when directly driving the coil primary, sooner or later a current spike might dammage the detector section of the module. It is also imperative that a ballast resistor be used with that setup to reduce the primary voltage, and some guys may not have done this.
When used correctly (as you are) with the HyFire IV ignition control box, the distributer (and module) become merely an ignition trigger sending a low current signal to the HyFire control box. There is also a bypass plug that will take the HyFire box out of the system. When using the plug, you must be sure that the ballast resistor (not needed when the control box is used) is back in the primary circuit. This could be a usefull troubleshooting tool. Next time it cuts out on you, bypass the control box and see if it runs.

Steve