Ok Guys, Heres the deal. I have a 91 RS with a 3.1. I replaced the coil, ignition module, plugs, wires, distributor cap and button three weeks ago because of no fire. The car ran great for three weeks with no issues. Drove it to work two days ago and it would crank but no fire. Getting fuel just no spark. Let it set all night and went back the next morning and just for gp I tried to start it...fired right up and drove it home. Two hours later ....Nothing! just cranked no fire!!! Have checked all fuses and relays. What is the next phase? Could it be a ground?

 

Pickup coil in the distributor and/or the two-wire pig-tail that goes from the coil to the ICM.

RBob.