Burning through fuel pumps
 

I have the beans diesel performance electric fuel pump kit for the obs 7.3.I've had it for 2 years and my first Bosch 044 lasted me 1 year before it died on me. Since then I have gone through 2 more. Wondering any ideas on how I'm going through full pumps so fast. Same set up havnt changed a thing. They just seem to stop on me. I can buy more time when it stops I'll tap it with a hammer and it will start back up? Grounds and wires are fine.