To narrow down my problems (in relation to my previous posts), I figured out that my hesitation/acceleration problem only occurs when I press on the accelerator to speed up. I have no problems if I am holding a steady speed,and the problem is more pronounced at highway speeds. I put in new fuel filters today, replaced all bad vacuum lines and reconected my EGR valve, but I still have this problem when I push the accelerator way down. Otherwise the car runs fine. What would be causing this? Fuel pump? Injectors? Water or contamination in the gas tank? Thanks for the help.

Greg
'83 300D 158K