Vanagon F4-1915cc 1.9L (Water Cooled) (1983)
Distributor Advance Unit: Testing and Inspection
Vacuum Retard Angle, Checking
Vacuum retard angle, checking
-
Connect vacuum tester VAG 1368 or equivalent according to manufacturer's instructions.
-
Disconnect plugs from idle stabilizer control unit and connect together.
-
Start engine.
-
Pull off hose from vacuum advance unit.
-
Check ignition timing; if necessary adjust to 5° ATDC.
-
Pull off hose from vacuum retard unit.
Check with TDC sensor:
-
Add 5° to indicated retard angle.
-
Compare with specifications on chart for retard end.
Checking with timing light:
-
Shine timing light on timing mark again and bring mark back to original setting by turning knob on timing advance tester.
-
Read off retard angle and compare with specifications on chart for retard end.
-
Reconnect vacuum hose to vacuum unit.
-
Reconnect plugs to idle stabilizer control unit.