Correcting Co Level On Air Flow Senmr - Porsche 928 Workshop Manual

24
Electronic Fuel Injection
928
CORRECTING CO LEVEL ON AIR FLOW SENSOR
Note
If CO level is not the specified value. remove plug
from hole providing access to the mixture control
screw. This requires removal of the air flow sensor.
Removing
1. Remove air flow sensor
2. Drill hole in plug with a 2 mm dia. drill bit (UP: to
stop on steel insert).
3. Pull out plug with a left-turning drill (no. 2).
3. Close hole providing access to mixture control
screw with a new plug after finishing adjust-
ments. Press in plug flush.
Installing
1. Install air flow sensor.
2. Adjust engine idle speed and CO level. Turn
mixture control screw accordingly with a rcrew-
driver.
Turning clockwise
= richer mixture
Turning anticlockwise = leaner mixture
Note
Never reuse a drilled plug I
24.24
Correcting CO Level on Air Flow Sensor
VI. 1982 Printed in Germany