I have a 1989 525i, E34 with the M20 engine with 160000 miles. When warm,
the engine hesitates on acceleration, mainly from
a stop and exhibits a rough idle that occasion will stall. It also takes
longer to start sometimes, cold or hot. The problem is worst when
accelerating from a stop and idling while stopped. I have to put the car
in N to avoid it stalling. Sometimes you can also feel the hesitation
under mid range acceleration. I also check the idle control valve it looks like
there is fuel in it don't know if this is normal