My question is on a 1991 Buick road master,305eng. 130k miles.First I have lost power to TBI,need to know how to test nozzles to be sure they are eather good or bad. Secound found 7.5 amp.fuse out replaced and blew now.No power from ECM to eather the blue wire or the green wire,that go's to the spray nozzles, open the ECM and found two resisters burnt, Need to find out if nozzles caused this or if it was just time for the ECM to go,