Porsche 928 Workshop Manual page 450

928 Fuel
System
25
CHECKING AND ADJUSTING REST POSITION OF AIR FLOW SENSOR PLATE
Checking
1. Pull off high tension wire 4 from distributor
and operate starter approx. 10 seconds.
2. Upper edge of air now sensor plate
must
be
flush with beginning of venturi cone or at most
4-p/~ 1
a max. of 0.5 mm higher (strive for lowest
'2
/'
position).
c
\
1
3. Air flow sensor plate must be horizontal and
centered in venturi.
Adjusting
An excessively high air flow sensor plate setting
can be corrected by driving down the stop spring
guide pin with a drift and light hammer.
Note
Adjust very carefully. so that guide pin is not
driven in too deep.
Avoid repeated adjustments in both directions,
since this would loosen press fit of pin.
a
hinted in Germany - I. 1878
Checking and Adjusting Rest Position of Air Flow Sensor Plate
25 - 13