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 ignition timing is not within specification, loosen distributor or crankshaft position sensor lock bolt. Rotate distributor or crankshaft position sensor until timing marks are aligned. Tighten lock bolt.

Connect Diagnostic Tester (49-B019-9A0) to data link connector. Set SYSTEM SELECT to position 1 and TEST SWITCH to SELF-TEST, or connect jumper wire between data link connector terminals TEN and GND. See Fig 1 .
If ignition timing is not within specifications, see appropriate articles:
- TESTS W/O CODES
- TESTS W/CODES

Disconnect diagnostic tester or jumper wire from data link connector.

Fig 1: Identifying Data Link Connector Terminals

Courtesy of MAZDA MOTORS CORP.

Fig 2: Locating Ignition Timing Marks (Typical)

Courtesy of MAZDA MOTORS CORP.

IGNITION TIMING SPECIFICATIONS (Degrees BTDC @ RPM)

Application

M/T

⁽¹⁾ A/T

Leading ⁽²⁾

⁽³⁾ 5 @ 720

Trailing ⁽²⁾

⁽³⁾ 20 @ 720

⁽¹⁾	Place automatic transmission in Park.

⁽²⁾	Connect jumper wire between terminals TEN and GRD of data link connector.

⁽³⁾	Timing specification is AFTER TDC and is not adjustable.