Need some diagnostic help. Last year the last drive around the block in my 1971 S I had experienced some throttle problems. Engine started to die out. Would start up right away and rev, but soon as I started to pull out again, it would stumble and then shut off. Not having the time and it was getting real cold, I decided to garage it and figure it out later. Well now is later. But a new symptom seems to have arised. No fuel to the injectors therefore no start. Here is what I checked so far:

Fuel pressure: About 13-15 PSI from the fuel filter
Spark and plugs: Good
Fuel to MFI: Good, same 13 PSI
Fuel to injectors NONE under cranking or otherwise
Shut off soleniod Appears to stroke when 12v is applied, off when cranking

Since I am getting good fuel pressure to the MFI pump and nothing is coming out to the injectors, it appears that something may be stuck in the pump. I know there is a fuel rail that the soleniod engages on deacceleration to shut off fuel flow, but what is the best way to get to this? Could it be this? Could it be clogged? Best place to start checking? Big hammer? Any help? Thanks Allan