Thread: Where did my power go??

I can't imagine a MAF issue would cause fuel pressure to go so high.

I still don't feel that you've eliminated the possibility of some sort of internal blockage in the return line. The quick disconnects on a (stock L67) fuel rail do require a special removal tool, like this one:
Amazon.com: OTC 7660 Fuel Line Disconnect Tool: Automotive

You may find one at a local Auto Parts store.

Your voltages sound reasonable. If you can eliminate blockage in the lines, then I'm beginning to think that something's gone haywire with the electric motor in the pump itself. Does the pump sound funny when the pressure goes up? Like an electric motor spinning super fast?

I don't think the fuel pump sounds any different than normal. IfI can get the return line off, then I'll try to route the return line into a gas can and see if the pressure goes down.