911, thanks for replying. First thing I am going to do is get a fuel pressure gauge before I do anything.

I do not have a misfire or anything. Just really low on power when running on pump diesel. This has happened over a period of a couple weeks or so.

Seems unlikely to me that things could be gunked up already. I've been running this fuel about 4 weeks and drive the car everyday to work. Diesel tank always has a good dose of some kind of injector cleaner it is to clean everything out.

I'll get the fuel pressure gauge on tomorrow and report back.

Pump tag, I'm assuming this means MW pump: