[jason1]

That is what I originally thought, but my inexperience led me down the wrong path with this one.

I thought that somehow the 2 sensors, talked directly to the solenoid and could cut it off.

What I do not understand is whether those two sensors do in deed have the ability to shut the engine off. If in normal circumstances, a cummins kta19 is not wired that way, then I am mistaken.

So my thoughts now are:

1. When i managed the replicate the fault the voltage at the solenoid was 0 volts. Even with the ignition on, which normally provides 24 volts if switched on.
2. Would I then be correct in assuming a sensor does indeed have the ability to cut the engine?
3. Or am i more likely to find a wiring fault or bad earth is the cause of my issue?

The fault seems to happen with a sudden change in engine conditions, ie .. into or out of gear, sudden change in RPM etc, which leaves me thinking a faulting earth.

All I am trying to do here is understand HOW these systems work – so I can better diagnose that might be happening.

Any help appreciated :

[jason1]

Ok, so I know the following having read the engine manual.

The fuel shut off solenoid receives signals to shut off from the

1. 2nd low oil alarm threshold sends shutdown. (is the signal sent to the ignition of the solenoid?)
2. Overspeed sensor on the flywheel
3. Ignition.

I’m thinking its a fault solenoid or faulty sensor. Thoughts?

[Author]

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