400 SEL lacks pick up and power

Can anyone help me with this? I am new to this group and need some advise. My 93 400SEL has no pick up at all. It boggs down when I accelerate, but when it finally does kick in, it flys. Doen anyone have any ideas as to this problem? I did have a tune up incl. new distributor caps about 3,000 miles ago. Thanks for your help guys..Chuck

[manny]

Lots of questions come to mind:

1. Did the tune-up include a new fuel filter?
2. Do you have a " Check Engine " light on ?
3. Has anybody checked the fuel pressure ?

I think we need more details.

Hey, thanks for the reply.... No, the fuel filter was not replaced, there was no check engine light on, and there was no fuel pressure check. I think that I can handle the fuel filter change, but I need the location... would that be a good starting place? Thanks again for your reply, Chuck