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Ignition Timing

  1. 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 4 and Fig 5.
    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.
  2. Adjust idle speed to specifications. Install jumper wire across terminals of engine check connector (if equipped). See Fig 1, Fig 2 and Fig 3.
  3. Disconnect and plug both distributor vacuum hoses. Adjust timing by turning distributor.
Fig 1: Camry Ignition Timing Adjustment
G61203Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Celica Ignition Timing Adjustment
G61202Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 3: MR2 Ignition Timing Adjustment
G61204Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
IGNITION TIMING (DEGREES BTDC @ RPM)

Application Timing: Vac. Plugged Timing: Vac. Connected
Camry 10 @ 700 (1) N/A
Celica (Exc. GTS) 10 @ 700 (1) N/A
Celica (GTS) 10 @ 750 (1) N/A
MR2 10 @ 800 (1) N/A
(1) With engine check connector shorted.
Fig 4: 2S-E Eng Tach Hook-Up/Idle Speed & Timing Adjust
G61176Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 5: 3S-GE Eng Tach Hook-Up/Idle Speed & Timing Adjust
G61177Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 6: Ignition Timing Marks
G46452Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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