With my car, 50% of the time I had to keep the engine running with my foot. It would take what seemed like forever to start when cranking. Sometimes it would fire straight away, other times maybe 30 seconds. If i was travelling along and came up to a stop light say, i'd have to brake with my left foot and keep the engine running with my right.
So it might be worth trying it... it costs nothing. I did nothing to make the adjustment go out... apparently there is a piston in the fuel distributor that sticks, and turning the screw frees it up.

Regards

__________________
Ben

'85 500 SEL
'85 928S2
'88 560 SEC
'90 750i