Spark Timing Control System

Fig. 415 - Spark Timing Control System:

This system, Fig. 415, functions as does the system on the 1981 200SX except that when engine is idling and transmission switch is on, vacuum advance only occurs when coolant temperature is between 5O-2O3° F. To test system, refer to test for 1981 200SX. Thermal vacuum valve should be open above or closed below 203° F.