[buzzinhalfdozen]

WOW I've never heard of many switch failures till now...however here's what I'd do to eliminate that as a source of the problem. If box is easily accesible put a volt meter in car, when issue arises simply test for voltage on the IGNITION point on the box should be battery voltage.If box is not easily accessed put a short lead on Ignition terminal of box with insulated end, then do the same test as quickly as possible as it appears the issue resolves itself.Other option is to zip tie, duct tape, velcro meter in car already hooked up and merely switch on as needed to test.Personally to quickly narrow down the issue I would use my MSD tester to quickly rule out a non funtional crank sensor, test the ability to fire the coil ect. Good luck and let us know what you find. Joe