Hello all. My friend has a 1994 Ford 7.3 IDI diesel with a Hypermax turbo setup on it. It keeps blowing the 20amp glow plug circuit fuse. Now I traced the wiring to the fuel shut off solenoid on the injection pump (connector on the drivers front side of pump). Unplug it and the glow plugs now cycle and I have a wait to start light again. I haven't tried starting it because the batteries were dead but am now charging them. My question is I have talked to the Ford dealer and found that this part is only serviced as a injection pump itself. I then talked to the International dealer and he said he "thinks he did just the solenoid once" but couldn't give me a price or part #. I am sure someone has come across this before. I am new to these older diesels so any help would be greatly welcome. Thanks ahead of time.
You will need to find a local injection pump shop that handles Stanadyne pumps.
There are two solenoid under the injection pump cover, one is the fuel shut-off (larger one) and one is the timing advance (smaller one)
Be careful if you are going to do the replacement yourself. If you don't do the job right you could trigger a run-away where the truck can not be shut down. Not a pretty sight watching your engine blow itself to pieces and there is next to nothing you can do (other than maybe cut the main fuel line)
It might be best to let the injection shop handle the job.
What most likely happened to your old solenoid is that somebody left the key on without the truck running. The fuel shut-off solenoid need fuel flow across it for cooling. If the key is left on without the engine running for too long the solenoids overheats, cracks and burns out.
I recently tried to get the Injection pump in my 91 F350 rebuilt and one of the many reasons why I opted for a replacement pump was that my fuel shutoff solenoid was cracked and needed replacing as it probably would not have lasted much longer.
Ok are you sure it is the fuel solonoid wire or the cold advance wire If it is the cold advance just leave it unhooked it will run fine some guys say they even start better, I have tried it and found no difference.