Van Wagon L4-2350cc 2.4L SOHC (1990)
Fig. 37 Idle Speed Adjustment Screws (SAS)
7. Loosen the fixed speed adjusting screw (SAS) fully. Fig. 37
8. Connect a tachometer, start the engine and maintain idle speed.
9. Check that the idle speed is within specifications.
Basic Idle Speed:
750 ± 50 RPM
10. If idle speed is not as specified, adjust the ISC adjusting screw with a hexagon wrench.
11. Turn the fixed SAS in until the engine speed rises slightly.
12. Back-off the fixed SAS to the "touch point", where the engine speed ceases to decrease.
13. Back-off the SAS an additional half turn from the "touch point".
14. Stop the engine. Readjust the accelerator cable.
15. Reconnect the electrical connector for the idle speed control servo and remove the voltmeter from the engine.
16. With the ignition switch OFF, disconnect the negative battery terminal for at least 15 seconds. This will clear any diagnostic codes that may have
occurred during testing.
17. Reconnect the battery, start the engine and check that the engine is operating in the normal idle range.
