Ignition Timing

Ensure engine is warmed to normal operating temperature and idle RPM is properly set. Disconnect and plug distributor vacuum hose.

Connect timing light to No. 1 cylinder spark plug wire. Loosen distributor clamp and turn distributor until timing is within specifications. See Fig 1 .

Fig 1: Ignition Timing Mark Location

Courtesy of ISUZU MOTOR CO.

IGNITION TIMING (Degrees BTDC @ RPM)

Application

⁽¹⁾ Timing

I-Mark

6@900

P'UP

Federal Man. Trans.

6@800

All Others

6@900

⁽¹⁾	Distributor vacuum hose disconnected and plugged.