So my engine (or drive?) has developed this high-pitched whistle-like noise. I've done some online research and a lot of posts and videos suggest the fuel pump might be the culprit. My pump has been whining for years, but the pitch is more or less constant, eventually drowned out by engine noise when up on plane.
This new noise will appear at around 1500rpm, but will eventually disappear once I throttle to above 3000rpm. When throtteling down, the noise will reappear and the pitch will increase as I reduce revs and eventually disappear (at least out of the frequency range of my hearing) as I come down to no-wake speed which is at around 1000rpm.
Any thoughts on this? Is it the fuel pump or could it be something else? I removed the paint form inside the fuel cell assembly a few years ago, replaced the high-pressure rail screen with and e-clip and cleaned my injectors this season.
This new noise will appear at around 1500rpm, but will eventually disappear once I throttle to above 3000rpm. When throtteling down, the noise will reappear and the pitch will increase as I reduce revs and eventually disappear (at least out of the frequency range of my hearing) as I come down to no-wake speed which is at around 1000rpm.
Any thoughts on this? Is it the fuel pump or could it be something else? I removed the paint form inside the fuel cell assembly a few years ago, replaced the high-pressure rail screen with and e-clip and cleaned my injectors this season.
