Mike:

Four pulses per rotation per the manual, there are four tabs or magnets on the flywheel.

I don't know that the timing is correct cold, only that it runs better!

Peter

__________________
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!