Possible you're making it richer and not leaner? Turning the ALDA screw CCW enrichens fuel. More fuel than you need will actually make acceleration more sluggish as well as raising EGTs. A lean burn won't cause smoke, but will reduce power greatly. Leaning the fuel curve is essentially the same as you trodding lighter on the throttle. It is nothing like adjusting a carburetor or K-Jet distributor.
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Current stable:
1995 E320 157K (Nancy)
1983 500SL 125K (SLoL)
Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)
Gone and wanting to forget:
1985 524TD 167K (TotalDumpster™) [Definitely NOT a Benz]
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