B23F Engine (U.S.A.)

Fig. 313 THROTTLE VALVE SWITCH ADJUSTMENT:

1. Check throttle switch by opening switch and listening for a "click". Fig. 313.
2. Adjust throttle switch by loosening retaining screws (3 mm screw). Turn switch slightly clockwise. Turn switch back again until "click" is heard. Tighten retaining screws. Recheck setting.
3. Connect a tachometer.
4. Engine must be at operating temperature and air conditioner off.
5. Ground blue - white wire at test connector (located next to ignition coil).

Fig. 136 IDLE SCREW LOCATION ON THROTTLE BODY:

6. Adjust engine speed to 720 RPM with idle screw at the throttle body. Fig. 136.
7. Disconnect grounded test connector.
8. Engine speed should increase to 750 ± 20 RPM.
9. Disconnect all test equipment.