The last few day i've noticed that my walbro 255 has been kinda screeching a little bit on top of its normal whine. It almost sounds like a loose belt under the hood would sound like only not as loud. It is not rewired. When i first noticed the noise it was only at idle and if i reved it up it would stop which kinda lead me in the direction that it needed to be rewired but now it makes this noise all the time no matter what rpm's i am at. Is the pump on its way out? Its only about 2 years old and has less than 10,000 miles on it. I also have a low rpm knock problem until the car warms up and i lose fuel pressure as soon as i shut the car off i am not sure if any of these things have anything to do with each other but any help would be appreciated.
Thanks
