Adjusting Idle - Porsche 924 Workshop Manual

924
ADJUSTING IDLE SPEED/ CO
(fro m 1 9 8 1 M o d e I s)
Note
Adjusting Requirements:
Engine must be in perfect running condition and
ignition timing must be set properly.
1. Pull off rubber cap on oxygen sensor plug and
detach plug connector.
2. Connect CO test line on test connection of
catalytic converter.
3 . Run engine to operating temperature (oil
temperature 80° to 90°
Cl
176° to 194° F ).
Apply special tool 9122.
Printed in Germany · X, 1982
Fuel Mixture
25
4. Connect CO tester according to manufacturer's
instructions.
Note
The electronic idle stabilizer (EIS) will change
the ignition timing and consequently CO level
and idle speed, so that EIS must be placed out
of operation for following test.
5. Disconnect plug in engine compartment on left
wheel house wall above ignition control unit.
6. Turn control screw or bypass screw on throttle
housing until specified speed is reached.
Adjusting Idle Speed/CO (from 1981 Models)
25. 4
f