Guess you didn't still have the gauge hooked up? Keep the gauge connected and make it to where it can be viewed when driving..may look stupid but if all else fails tape it to the windshield, at least you will figure out if the pump is the problem is the pressure goes down serverly when it stalls.

 

yea tomorrow after i get home from class im goign to hook the gauge back up and sit it visible from inside the car. im just gonna drive it around the neighborhood until it stalls