626 L4-2000 1998cc (1983)
Distributor Advance Unit: Testing and Inspection
California
Fig. 57 Centrifugal spark advance chart (Calif).
1.
Warm engine to operating temperature.
2.
Ensure idle RPM and ignition timing are within specifications.
3.
Disconnect vacuum hose(s) to vacuum control and plug end of hose(s).
4.
While gradually increasing engine RPM, use timing light to check advance Fig. 57. Excessive advance indicates a weak or broken governor
spring. Insufficient advance indicates a governor weight or cam malfunction.