What would be involved in a "performance tuneup" that we cannot do ourselves? If we just remove the rack limiter, tweak the TC as much as it will go before idle problems develop, what else is there to do? I think what we really need are bigger plungers to pump more fuel. It seems that 10mm plungers may be available, so maybe we should follow it in this direction..

EDIT: I voted for 600plus assuming a rebuild with bigger elements. I'd actually pay at least double that.

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99 E300 Turbodiesel 100k