BenzWorld Senior Member
Date registered: May 2007
Vehicle: 64' 220SEc, 72' 300SEL 6.3, lots of parts
Location: San Diego/Spring Valley
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Map sensor adjustment
Unscrew will lean total mixture,
Think of the MAP sensor as an altitude compensator,
that screw raises or lowers the "set" altitude of the entire system.
This analog system operates on the difference of vacuum / pressures.
No more than 1/8 of a turn per tank of fuel.
Add 1 Qt of ATF per tankful.
Also Idle mixture will need adjustment too.
I have spare MAP sensors for substitution and messing with so as to not disturb your original as-is calibrations..