Truck is a 1990 Ext Cab pickup. Sat for 2 months while I'm gathering parts for a new engine. Went to start it the other day to move it into the garage. No start. Solid cranking, no start. Checked for spark. Spark seemed fine. Fuel in tank. Fuses all good. Jumped the diagnostic port to look for codes. No codes. Jumped the B and FP connectors in the diagnostic port. Fuel pump hums nicely. Called it quits due to the heat. Did a bunch of searches on Mud and elsewhere. Was about to change fuel filter, check MAF, check cold start injector, and check Circuit opening relay. Decided to jump the B and FP connectors again, and then try starting. FSM did not indicate that as a possibility, but it worked. Started and ran fine and made it into the garage. Am I correct in assuming that the MAF is working fine and the COR is clearly not? COR is the original, 34 year old one, I'm pretty sure. Cold start injector doesn't need to work, because it is too hot right now. The COR is one of the few things I don't have 2 of, so I can't throw in a spare to test. Let me know if I am off track or should look at other issues in the starting system.