Seems my Bosch 044 pump is screaming it's tits off, sometimes it quiet and other times really loud. The pump is around 2 yrs old but has seen very very little use.

I am aware normally when fuel
pumps go bad they make a loud buzzing noise, but, could a bad or clogged filter cause it to sound like it's cavetating and make a similar noise? I plan to replace the filter but is it more likely the pump is buggered?