Ignition Timing

Engine must be at operating temperature. Connect timing light to engine. Connect tachometer to negative terminal of coil, engine check connector, or remove rubber cap and connect probe to service connector on distributor (if equipped). See Fig 2.
CAUTION: Some tachometers may not be compatible with ignition system. Consult tachometer manufacturer before connecting tach to system. Do not allow tachometer terminal to become grounded. This can damage igniter and/or coil.
Adjust idle speed to specifications. Install jumper wire across terminals of engine check connector (if equipped).
On all models, disconnect and plug both distributor vacuum hoses. Adjust timing by turning distributor.

IGNITION TIMING (DEGREES BTDC @ RPM)

Application

Timing: Vac. Plugged

Timing: Vac. Connected

Pickup & 4Runner (EFI)

5 @ 950 ⁽¹⁾

N/A

Pickup (Carb.)

0 @ 950

12 @ 950

⁽¹⁾	With engine check connector shorted.

Fig 1: Tach Hook-Up, Idle Speed & Ignition Timing Adjustments

Fig 2: Tach Hook-Up, Idle Speed & Ignition Timing Adjustments

Fig 3: Ignition Timing Marks