Adjustment W/ CO-Meter

Fig. 329 ADJUST IDLE SPEED:

1. Connect tachometer.
2. Remove the test plug in front of catalytic converter.
3. Connect CO-meter.
4. Run engine to operating temperature and 10 minutes beyond.
5. Check and adjust idle speed with air conditioner off (750 ± 20 RPM). Fig. 329.

Fig. 331 ADJUST IGNITION SETTING:

6. Check ignition setting (12° ±2) at idle speed. Fig. 347. Adjust timing by turning distributor.

Fig. 348 DISCONNECT LAMBDA SOND (OXYGEN SENSOR):

9. Disconnect Lambda sond (oxygen sensor). Fig. 348.
10. Check CO content (0.2 - 1.0 %).

Fig. 349 REMOVE CO ADJUSTMENT SEAL:

11. To adjust CO, turn off engine.
12. Drill two 2 mm (0.08 in.) holes into the plug. Fig. 349.

Fig. 350 CO ADJUSTMENT:

13. Remove plug with needle nose or circlip pliers.
14. Start engine and run to operating temperature.
15. Adjust CO content to 0.6 %. Fig. 350. Adjusting range for screw is 15 turns. Counter clockwise reduces CO content, clockwise increases CO content.
16. Reconnect Lambda sond (oxygen sensor).

Fig. 326 IDLE SPEED TEST CONNECTOR:

17. Ground red - white wire at test connector Fig. 352. located in front of passenger side strut tower.

Fig. 329 ADJUST IDLE SPEED:

18. Check and adjust idle speed with air conditioner off (700 RPM). Fig. 329.
19. Remove ground wire from test connector.
20. Engine speed should now be 750 ± 20 RPM. If idle speed is incorrect, see "IDLE SPEED" for more adjustment procedures.
21. Turn off engine. Disconnect all test equipment and reinstall test plug into exhaust pipe.
22. Seal CO adjustment screw with new plug. Tap new plug into position.