Ignition Timing

Check or adjust ignition timing with engine at normal operating temperature, distributor vacuum hose disconnected (Turbo B21F), air conditioning "OFF" (if equipped), and engine speed set to specification. If possible, use magnetic timing device to set ignition timing.

IGNITION TIMING (DEGREES BTDC @ RPM)

Application

Timing

Non-Turbo

⁽¹⁾ 12@750

Turbo

12@900

⁽¹⁾	Distributor vacuum hose connected.

Fig 1: Volvo 4-Cylinder Timing Mark Location