fuel injector cleaner
I've had trouble with my '08 and then again with my '09 690. it appears to be intermitent at first, has you chasing electrical faults, but ends up being a filter issue in the end. I replaced the whole pump/filter assembly in the '08 to solve the problem. The real issue was the filter though. It's tendancy to clog up easily led to unusual strain on the pump. My '09 started to show the same symptoms, so I started to use fuel injector cleaner on a regular basis (every 3 or 4 tanks). The symptom have not returned for the last 2000km. Keep the filter clean, and the pump will be fine.