Ignition Timing

NOTE: Before adjusting ignition timing, warm engine to normal operating temperature. Turn off all accessories. Place transmission in Neutral (M/T) or Park (A/T). Ensure idle speed is correct. See IDLE SPEED under IDLE SPEED & MIXTURE. If timing is not within specification, loosen distributor or Crank Angle Sensor (CAS) lock bolt. Rotate distributor or CAS until timing marks are aligned. Tighten lock bolt.

Fig 1: Locating Ignition Timing Marks (Typical)

Courtesy of MAZDA MOTORS CORP.

NOTE: On Miata, use Blue 1-pin connector near airflow meter as a source of battery power for positive lead of tachometer or timing light (battery is in trunk). DO NOT ground this connector, or 20-amp WIPER fuse will blow.

Connect Diagnostic Tester (49 B019 9A0) to diagnostic connector and select SELF-TEST mode (position 1), or connect jumper wire between diagnostic connector terminals TEN and GND. See Fig 2 .
Connect timing light. Set timing to specification. See IGNITION TIMING SPECIFICATION S table. See Fig 1 .

Fig 2: Diagnostic Connector Terminal ID (MX-3, Protege & 323)

Courtesy of MAZDA MOTORS CORP.

IGNITION TIMING SPECIFICATIONS

Application

M/T

⁽¹⁾ A/T

MX-3

1.6L ⁽²⁾

10 @ 750

1.8L ⁽²⁾

10 @ 670

Protege

DOHC ⁽²⁾

10 @ 750

SOHC ⁽²⁾

California

5 @ 750

Federal

7 @ 750

323 ⁽²⁾

7 @ 750

⁽¹⁾	Place automatic transmission in Park.

⁽²⁾	Connect jumper wire between terminals TEN and GRN of diagnostic connector.