What I need to have happen is this:

If there's an accident the first thing the safety crew will do is switch off the main power switch at the rear of the car (a battery kill switch is required and I do have it). At that time the engine must be simultaneously killed. Any Diesel will take a few seconds to shut down which is the best that can be done and I think the safety folks OK with that.

What I have is complex but hopefully (needs to be tested) will activate vacuum from a reserviour to effect shut-down using the factory vacuum diaphragm system. I was just trying to come up with a simpler way.

My confusion lies in the internal fuel routing in the IP. Maybe another way to phrase the question is:

When the factory shut-down system is actuated, what happens inside the pump? Does it block fuel flow out of the pump to the injector lines, does it stop fuel flow into the pump, or???

Can anyone post a good functional cutaway drawing on the pump showing what the shutoff system does? If I could see that it might give other possible solutions. Maybe I could replace the vacuum can with a linear motor (solenoid similar to what they use for a power door lock) making for a simpler system.

Again, THANKS all!

Dan