Quick Fass question

[fastrider450r]

My dad's 01 has a Fass 150, Truck runs great but unlike other Fass's and my Airdog that i've heard, when the pump is supposed to be running, all I hear is a "whining" sound that is very faint, its not like mine. Just wanted to make sure before I get further into it. It was installed about 6-7 years ago. Thanks!

 

[LReiff]

You'll need to verify fuel pressure at the injection pump. If fuel pressure is fine it's all ok.