Search the Community
Showing results for tags 'fule pump'.
Found 1 result
Hey guys it's been a long time. My 89 bronco 5.8 efi will crank but no start. The PO had been using the "wrong" battery with the polarity backwards from the ergonomics of the truck wiring so a few things had been moved to make it look like it was supposed to be like that. anyway, long story short I hooked it up backwards. I have been diagnosing the no start using these: http://troubleshootmyvehicle.com/ford/4.9L-5.0L-5.8L/how-to-troubleshoot-a-no-start-1 http://easyautodiagnostics.com/ford/4.9L-5.0L-5.8L/eec-power-relay-tests-1 http://easyautodiagnostics.com/ford/4.9L-5.0L-5.8L/fuel-pump-relay-tests-1 EEC checked out all good, sprayed starter fluid into the intake and she started so I know I've got spark. The relay was old and had some corrosion and I've already changed it out with another I know is working. I have probed the wires at the pump and am getting no power to pump. I replaced a fusible link near the starter solenoid and all wires coming off starter solenoid have around 12volts (I checked after the fusible links, but maybe there are more to check) I have power to fuel pump relay but when testing continuity to the ground on the relay, the light comes on before turning the ignition on, then turns off when the ignition is turned on. which is opposite of what should happen as far as I have read. Jumping the #3 and #4 wires on the relay turns something on, but not the fuel pump. I hear a faint "pump-like" noise when they are jumped, but no fuel pressure and no auditory (sound) evidence of the fuel pump coming on. hopefully you guys can help.I have a few pictures loading from my camera that I will upload in a minute