Does this machine have an electronic dash? I had a NH skidsteer from 1997-1998 that did the same thing. The control board"dash" went bad. It wouldnt send voltage to the fuel solenoid to keep fuel to the engine. $700 for a new dash and everything worked as it should.
 
Not sure how the tractor solonoid is wired, but if it has three terminals, start, run, and battery, then probably the solonoid is failing to supply current to the run terminal. Test light should show if that"s the problem.
 
Gas or diesel.
If gas the wire from the run position to the coil it defective. It has a built in resistance to lower the voltage from 12 volts to ~ 6 Volts. There is a second wire from the start position that is not resistive to supply the full 12 volts to get it started.
Diesel ?
Keith
PS post this under the ford forum for better responce.
 
Did you change the ignition switch or otherwise muck around with the wires?
At first glance I'd say that the fuel solenoid wire is simply hooked to the starter circuit terminal at the switch...
Otherwise I'd say that the switch is on it's deathbed... but you should also notice a dead instrument cluster with the key turned on...
I'm not overly familiar with how the fuel solenoid circuit is wired exactly on that thing as mine are all manual shutoffs... but I suspect it's pretty simple.
The old Lucas ignition switchs also seem to have a self destruct timer... set to blow when you need it most.

Rod
 
Randy,

I own a 98 3930. The first thing I would check is the fuel solenoid mounted to the diesel injection pump.

On mine if I recall, it is a blue wire connected with a standard 1/4 inch quick connector. Make sure you have 12V in both the "run" and "start" position. You description sure sounds like you only have 12V on the solenoid during "start". If so that would lead you back to the ignition switch itself.

Also while you"re messing around, make sure the connector fits snug to the solenoid, took me a couple of days of toubleshooting my intermittent stalling problem, until I found the connection loose.

Rick
 

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