I had a 87 z28 but just bought a 92 rs that was 305 tbi. the po put a 77 350 w carb and turbo 350 trans. Car was running pretty well until last week. Fuel pump and cooling fan stopped working. I've checked fuse near battery that goes to ecm/fp. If i jump the fp relay connecter from the gray to orange pins fp runs. if i jump cooling fan from brown to red/black it runs. There is another relay on passenger side that i tried swapping relays. No good. im also noticing now a drop in voltage when car is running. Any ideas?