If you have not already done so, you can disconnect the EGR vacuum hoses, including the two white vacuum switches located inside the "black box" on top of the valve cover. Disconnect the two hoses at the rubber connectors closest to the main vacuum line near the inner fire wall. Plug the rubber connector with (your choice) golf tee, drip irrigator hose plug, etc. This may not directly give you greater acceleration, but it will eliminate a lot of potential vacuum leakage.

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Jeff Naumann
Torrance, California
1972 220D 138k miles (sold)
1982 300SD 263k miles
1989 BMW 750iL 183k miles
1993 Dodge D250 Cummins 5.9 202k Miles