If you are looking to save some money and get a good pump look up TRE Performance.

I've been using a high flow pump of theirs for about three years now. Other 96-99 guys have well, And recently the W body community is paying them a lot of attention with great results. To date, I haven't heard anything bad.

I paid $80 for a high flow pump for the car and $40 for a normal pump for my truck. 3 Years of testing and going strong. Recently a Regal buddy paid about $80 for your type of pump.

Thanks BillBoost, my original question was to find out if there was a valve in the pump housing that would allow pressure loss if it was damaged. My old pump held pressure fine, only after replacing with a used pump from a non */c car did I start experiencing pressure loss. I checked other sites prior to installing the free used pump and found that the non */c pump works perfectly well on a stock */c'd car. The car runs great and the fuel pressure is not a problem, only loss of pressure once the car is shut off. I plan on ordering a new one next week from TRE. Thanks for the info on that, it looks like a quality piece for a great price.