Porsche 928 Workshop Manual page 346

928
Electronic Fuel Injection
24
ADJUSTING IDLE - USA and Japan
(from 1980 Models with L-Jetronic)
Requirements:
Engine in perfect mechanical condition and
ignition timing adjusted correcrly.
1. Fold up foot support in foorwell of passenger's
side and disconnecr oxygen sensor plug.
2. Connect CO rest line US 8023 or SUN 120-239
on test connection of catalytic converter.
3. Run engine to operating;emperarure (oil
remperature approx. 80 C). Use special
roo1 US 8025.
4. Connect CO tearer I0 supplier's instrucrions.
5. Turn corm01 screw or bypass screw on throttle
housing until specified speed is reached.
Use separare tachometer of ~esrer or similar.
Make adjustments as quickly as possible to avoid
a
excessive heat in intake ports and consequently
wrong co values.
Printed in Germany - Vii, 1983
Adjusting Idle - USA and Japan 24 - 5