93 Silverado- no power on acceleration or hills

[timwalsh]

This problem developed overnight literally.
One day it was fine the next day it had this problem.
The fuel pump was changed last year.
No codes
O2 sensor, points, plugs, cap & rotor and carburator gasket
(can't think of the correct name seeing as it doesn't have a carb.) replaced last month.
EGR makes the car stumble when I press on it and the vacuum tubes
are hooked up.
It idles fine and revs up fine out of gear.

Thought I would check with you all before I bring it in to get scanned.
Thanks,
Tim

[timwalsh]

It needed a new fuel filter
Runs like a champ
I had no idea it could make that much of a difference.