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Home >> Volvo >> 1984 >> 760 Base >> Repair and Diagnosis >> Engine Performance >> System >> Turbocharger - Gasoline >> Testing >> Timing Retard

Timing Retard

  1. Connect a standard radiator pressure tester to distributor vacuum advance unit. Plug hose removed from distributor.
  2. Using a dwell meter with a scale extending to 70°, set on 4-cylinder setting and connect it to the Lambda sond service pickup of the electronic control unit. See Figure .
  3. Start engine. Note ignition timing at idle. Pump pressure tester up to 5.1 psi (.35 kg/cm2 ). Ignition timing should retard 6-10°. If not, check distributor and replace vacuum advance unit, if required.
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