Walt, If you have a good quite pump and restrict the flow then to may get noise, but if you don't restrict the flow on a pump that is making noise and now it can possibly run faster due to no restriction, then you will have more noise. The spring does work. I have a picture on the web site about it. Also, If you bought the pump from me, I will exchange it. John Hervey http://www.specialtauto.com/