The delivery solenoid is in the bottom of the pump. I made no attempt to touch that. I just replaced the whole pump. I got a pump from pensacola diesel because it was cheap. It did fix the problem but I am not real excited about the "rebuild" they did. I am not saying its a bad pump, but.... Not really rebuilt either. It was the cheapest one on ebay for a reason. I made a video of what I noticed if you want to look.
Again, not saying its a bad pump, but I dont expect a long trouble free life from it either.
The crank sensor falls apart when you touch it. Not fun. After the fact I see it is a common issue and there is lots of info online.