icanfixall
Official GMM hand model
What you mostly are looking for with the pressure from the filter to the injection pump is deterioration or decay of whatever pressure you have to start with. Say if you fire it up and see 4 lbs. Then it decays to zero. Now you know there is either an air leak or a line restriction. Then the engine dies. You then restart it and the filter refills till the injection pump demands more than the filter or the supply pump can push thru the filter. Hope this explains better what it going on. Finding the reason is the next hurdle.