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Chuck:
You have a double diaphram advance and a throttle postitioner. I will take a look at my Chiltons manual tonight (if I can find it) and see what the connections are. Two switchover valves, one for the advance and one for the retard, and I hope your's work -- the fance three-way one is NA.
Usually these are set up to retard timing at idle and on deceleration or when cold, then give full advance when the speed signal is above 2500 rpm or so. This will also activate the throttle positioner that keeps the throttle slightly open on decel to reduce unburned hydrocarbons.
Peter
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!
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