I can't figure this one out. I put in a new tank (plastic) new lines, new fuel filter, new fuel pump. Every 2 months I the fuel pump gets loud and I have to buy another new one. These are new BOSCH pumps. When I put them in until 2 months they are quiet. At 2 months they get loud and then I know I have 2 weeks and I will be stuck on side of the road somewhere. Other than the loud noise you would never know. The car runs great even when the humming starts right up until the pump dies. It's expensive to keep buying pumps. What can be causing this?