ADV2 - Inspect Timing

^ Disconnect and plug the vacuum hoses from the vacuum diaphragm.

Vacuum Advance:

^ Ground the Self Test Input (STI) connector.

^ Engine at operating temperature.

^ All electrical loads off.

^ Check idle speed:

Idle Speed 850 ± 50 rpm

^ Connect a Rotunda Timing Analyzer 059-00014 or equivalent.

^ Check timing:

Base Timing: 12 ± 1 degrees BTDC.

Timing Marks:

^ Is the Ignition base timing correct?

YES -- Go to ADV3.ADV3 - Check Centrifugal Advance

NO -- Adjust the timing.