Check your boost -- if you aren't getting much boost, it won't matter what the ALDA is set to, it still won't give you any more power since it isn't doing anything.

0-60 in 15 sec is a bit slow, should be about 12, I think.

Also check to make sure it holds pressure....

If you adjust the output of the turbo, don't go over 13 psi. Factory spec is 10-12, usually 10.5 or 11, and may be lower than that by now, the spring in the boost controller goes soft with age.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!