cause when u set it at say the s position or plug out and then do the mod i did it will pull more timing more than u can think. Just keep a notch down from where it pings
Try it man wont take more than an hour of fiddling. I swear it should make alot of difference. Check the other thread where i posted some
Values as a start point.
Hope u try them

__________________
Jay,
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-1995 Blue W202 C36 AMG (M) SOLD ;(
-1995 Black W140 S500 (Lady)
-1992 Black W124 E300 (Dima) (Ex-Mosselman
Twin turbo Kit).
-1988 Black W124 300 E 4-Matic.(Nadeen)
-1983 Brown W126 500SEL.(Old Lady)(Sold)
-1981 Gold W123 280CE.(Dareen)(Sold)
http://www.youtube.com/user/jayrasheed