Sorry, omitted to say this....I don't know how your lift pump should function, if it is OK, but consider this, the fuel supply, from tank to the lower aspect of your injection pump is low pressure. From the top end of your injection pump, fuel is supplied to the injectors as high pressure and they (injectors) deliver minuscule quantities of atomised fuel to the cylinders...so you don't need gallons of fuel being supplied. To prove your solenoid...remove it from the injection pump (leave the wiring in place) and turn on your ignition - check the position of the solenoid actuator with ignition off and on. The plunger / actuator should be held in or out. When it's in, it allows fuel to flow. When it is out (ignition off) it pushes against the rack control slide and shuts off the fuel. Yes, it is possible that you have faulty wiring at the ignition switch or along the wiring at some point. But removing the solenoid eliminates any possible malfunction of it interfering with fuel supply. With the solenoid still removed, if you still don't get fuel to injectors I will suggest 1 of 2 issues to consider. My problem was internal to the injection pump but it is possible that you may have a "severe" air lock within the pump and normal bleeding routines won't clear it. The best way to deal with the airlock possibility...remove the pump and then fill the top side, HP side, with fuel...then shake it, to expel ALL air and top it up again and refit it.Crank the engine, with lines to injectors disconnected....as the engine cranks, is any fuel ejected from the outlet ports on the pump? Please note...don't have anyone or yourself near the outlets during this test - any HP liquid can be very dangerous, so take care and stand to the side. If you have fuel from 4 outlets...airlock was the fault...if nothing is coming out then I'm suggesting an internal problem with the injection pump. The one thing I can't / won't do is evaluate your problem and the tell you what is wrong. Start with the simple things, keep track of what you do so that your fault finding is methodical...and, if you can, photo the various stages...they are great things to refer to.