Truck is a 1978 chevy k20 with a tbi swap. Today I was driving home and all the sudden the truck cut out and I coasted maybe 30ft then the engine picked back up again. It did it again a half mile later. I managed to get back home. Luckily I was only a few miles from home. Anyway in the driveway I managed to get the truck to do it again. I noticed that once it stalled if I turned the key off then back to the on position after maybe 10 seconds I could not hear the fuel pump turn on. I tried doing the on off thing for a few more times until I heard the fuel pump kick on then the truck would start again. I have had the exact symptoms of the truck stalling while driving from a bad icm. How can I definitely determine whether the fuel pump is going or if the icm is the culprit. Can a fuel pump intermittently work?