740 L4-2320cc 2.3L DOHC B234F (Can) (1992)
Throttle Body
Adjust speed to 500±20 rpm using throttle adjusting screw.
Note:
It is important to maintain speed within these limits.
Switch off engine.
Tighten adjusting screw locknut while holding screw to prevent it rotating.
Remove throttle switch connector jumper.
IMPORTANT:
- Check throttle switch
- Check throttle lever clearance (see item F)
F). ACTION WHEN AC COMPENSATION IS INSUFFICIENT AND ENGINE SPEED DROPS WITH COMPRESSOR ENGAGEMENT:
- Check throttle switch
- Use diagnostic system to check
- that idling (CIS) valve is operating. Use test mode 1 to check that fault code 2-2-3 is not present and test mode 3 to ensure that valve is operating.
- AC compressor on/off function. Use test mode 2 to check that acknowledgment codes 1-1-4 and 1-3-4 are displayed.
for Regina, early system:
Insufficient AC compensation:
Symptom may be noticed during extremely hot weather. In this case, additional bypass air is required. Proceed as follows:
- Disconnect the hose (arrow) from the throttle housing to the EVAP control and connect a vacuum gauge to the connection.
- Idle the engine.
- Measure the vacuum. (Normally, no vacuum should be present at this point.)
- Open the throttle with the adjusting screw until the gauge begins to read a vacuum. Then, close the throttle until the vacuum is again zero.
- Tighten the adjusting screw locknut (holding the screw to prevent it rotating).
- Check the throttle switch
- Check the throttle lever clearance (see item F).