So my grandfathers motorhome was idling really rough like it had a vacuum leak. Then it would start. Not getting any spark. Wire, plugs, and dizzy look ok? The only Ford's I have owned have been a 65, 95 Mustang, 70 Torino, 86 Escort and none of them had a 460 lol.

Do the ICU go out a lot. Where are they at on these and what do they look like?

Thanks