it certainly would be worth your while changing the fuel filter if it is due for a change as per the maintenance schedule.

my car had an intermittent noisy fuel pump which would buzz,hiss and groin at times, it was driving me nuts,so i replaced it with a new bosch one from the dealer, and the car is now a dream to drive,no more irritating noises and a quiet ride as it is supposed to be.

fastlane do sell bosch pumps on this website.