I had a similar experience. I flushed my coolant system. I had pulled the thermostat, gutted it, and reinstalled before flushing. Mind you, I am unfamiliar yet with the workings of this TBI/EFI system. When I went to start it to help with the flush it only cranked. I had already had two times it failed to start after, or during, rain. This was the morning after a rain, so I put the rotor and cap on I had for that problem. It still only cranked. Shoot, now what? I had power at the pink wire going into the coil but none coming out. So I started a thread asking how this system works, because I knew the ECM was involved somewhere. Before seeing the replies I decided to replace the coil anyway. The coil wire and contact on the coil were very crusty anyway. Still only cranked! Then I decided to fasten those three connectors to the thermostat housing stud. Maybe those wires had some purpose?
(It was an oversight) Fired right up!