Pump intermittently not working
 

My 1992 bravada while driving down the highway will just shut off had a fuel pressure gauge hooked up to it when it does shut off the gauge has dropped down to about 40 lb sat there for 30 minutes waiting on someone to come pick me up trying it every so often all of a sudden turn the key on pump kicks on starts right up drive about 5 MI does the same thing again it is a new pump it was doing this before I change the pump but it would always restart within 2 minutes now it's taking longer I just don't get it