eternalphoenix64
New Member
- Joined
- Jan 26, 2017
- Messages
- 12
- Reaction score
- 0
- Points
- 0
- Vehicle Year
- 1987
- Make / Model
- Ford
- Transmission
- Manual
So, like the title says, the fuel pump won't run. I'm starting to get desperate. This is the secondary, high pressure pump located on the frame.
Was working initially. Did a massive tune up (New TFI, cap, rotor, plugs, wires, coil) and suddenly the fuel pump wouldn't hum when I turn the key to the on position.
Replace pump and it still won't run. Decided to replace the relay and it STILL won't run.
Follow diagnostic process here: http://easyautodiagnostics.com/ford/4.9L-5.0L-5.8L/fuel-pump-relay-tests-1
Passes all of the tests except test 4. So I can get the fuel pump to run with a jumper wire, but it's not being activated by the computer. Diagnostic test to determine whether the problem is with the distributor or the computer says to check for spark off the coil. I have spark so I replace the computer.
THE FUEL PUMP STILL WON'T RUN!!!!!
HELP!!!!!
Thanks in advance.
Was working initially. Did a massive tune up (New TFI, cap, rotor, plugs, wires, coil) and suddenly the fuel pump wouldn't hum when I turn the key to the on position.
Replace pump and it still won't run. Decided to replace the relay and it STILL won't run.
Follow diagnostic process here: http://easyautodiagnostics.com/ford/4.9L-5.0L-5.8L/fuel-pump-relay-tests-1
Passes all of the tests except test 4. So I can get the fuel pump to run with a jumper wire, but it's not being activated by the computer. Diagnostic test to determine whether the problem is with the distributor or the computer says to check for spark off the coil. I have spark so I replace the computer.
THE FUEL PUMP STILL WON'T RUN!!!!!
HELP!!!!!
Thanks in advance.