Wow! 68k on a 2000! Lots of driving! I am replying because I too have a 2000 (SVT)and have been (was) plagued with fuel pump problems. Two new pumps were installed under warranty and when it started running funny, out of warranty 39k, I decided to check it myself. The problem is, you have to drop the tank to access the pump! To solve this I just cut the hole above the pump a bit larger and pulled it out from the top! The pics here will possibly explain your problem...
Returnless Fuel Pump EXPOSED! When you get way low on gas the only entrance into the sump is through that "disc" filter and if it's clogged, performance will suffer.(understatement)
EDIT: The pump in the photos has only 12k on it...the gas you buy can hurt you!
...Ed
