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Ignition Timing

CAUTION: Some tachometers may not be compatible with ignition system. Consult tachometer manufacturer before connecting tachometer to system. To avoid possible damage to ignitor and/or coil, DO NOT  allow tachometer terminal to become grounded.
  1. Ensure engine is at normal operating temperature. Connect timing light to engine. Connect tachometer to proper location. See Fig 1 and Fig 2.
  2. Install jumper wire between proper terminals of engine check connector. See Fig 3 and Fig 4. Ensure idle speed is within specification. See appropriate IDLE SPEED SPECIFICATIONS  table under IDLE SPEED & MIXTURE. Ensure base timing is within specification. See IGNITION TIMING  table.
  3. Adjust timing by turning distributor.
  4. Remove jumper wire from engine check connector and ensure advance timing is within specification. See IGNITION TIMING  table. Tighten distributor hold-down bolt. See TORQUE SPECIFICATIONS  table at end of article.
IGNITION TIMING

Application (1) Base Timing (2) Advance Timing
Camry 10 @ Idle 13-27 @ Idle
Pickup & 4Runner 10 @ Idle 8 @ Idle
(1) Check ignition timing with transmission in Neutral, and jumper wire connected between proper terminals of check connector.
(2) Check ignition timing with transmission in Neutral, and jumper wire removed from check connector terminals.
Fig 1: Connecting Tachometer (Camry)
G91H17910Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Connecting Tachometer (Pickup & 4Runner)
G91C17915Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 3: Installing Jumper Wire To Eng. Check Connector (Camry)
G91F17074Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 4: Installing Jumper Wire To Eng. Check Conn. (P/U & 4Runner)
G91A17079Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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