Injector Pump Question

[ikoinu]

History:
-Have had HMMWV for about 6 years, ran fine (with repairs and maintenance). Did not start it for almost 2 months. Vehicle had 1/4 tank of older fuel. Will not start now.

Current symptoms:
-No fuel expelling from exhaust on cranking. Not starting.
Note: Glow plugs working normally, new batterys installed.

Actions taken:
-Tank drained and dropped. Fuel sock replaced. Fuel level sender replaced. Tank cleaned (newer tank, not particularly dirty). Tank filled to 1/3rd.
-Fuel filter drain checked, fuel comes out.
-Fuel filter outlet hose to injection pump checked, pumps fuel normally.
-Injection pump return hose checked, flows while cranking.
-2 Injection pump outlet lines checked, barely flows at all.
-Multiple injectors cracked, barely flows at all.
-Tested 2 solenoid connectors on injection pump with ignition on, front wire shows 20+ volts and other wire appears to be ground.

Originally thought that the fuel level had gone too low or vehicle was not used long enough so it must have lost prime.
Fuel seems to be making it to the IP, but is not flowing out to the injectors (even if cracked).

Question:
Should both leads connected to the solenoid on top of the injector pump be positive at 24v when the ignition is turned on, or is one a negative lead? (Smart box issue?)

Note: I marked what I'm seeing for both connectors at my solenoid on a page from the manual.

 

[ikoinu]

I've tried pressurizing the tank a little while cranking to get fuel up to the IP, which appears to work.
Now I'm trying to decide whether all injectors need to be cracked to expel air (tough accessing some of them), or if the solenoid is possibly the culprit.

 

[Dieselmeister]

Pull a glow plug and see if it is wet with diesel. Are your plugs working? I doubt it's the fuel quality, unless it has water in it. If it resembles diesel, it will most likely work, even if it's old. If your IP is working, you will get about a drop when you crack the line and crank the engine. Remember, this is being injected into the engine at high pressure so it is a very small, metered quantity. Don't expect to see diesel "flowing" out of the injector lines.

 

[ikoinu]

Pull a glow plug and see if it is wet with diesel. Are your plugs working? I doubt it's the fuel quality, unless it has water in it. If it resembles diesel, it will most likely work, even if it's old. If your IP is working, you will get about a drop when you crack the line and crank the engine. Remember, this is being injected into the engine at high pressure so it is a very small, metered quantity. Don't expect to see diesel "flowing" out of the injector lines.

Plugs are fully functional. Installed a momentary manual system due to dumb box malfunction a while back. Everything worked fine for a number of years. When the glow plugs were not working before there was a strong fuel vapor emitted from the exhaust after cranking for a bit. There is no fuel coming from the tailpipe now.
Thinking about pulling all glow plugs as a way to check that cylinders are receiving fuel.