Ignition Timing

NOTE: All 1978-79 engines include a magnetic timing probe socket. Insert probe into timing socket until it contacts vibration damper. Socket is located 9.5° ATDC. Do not use the probe location to check timing using a conventional timing light.

NOTE: If a timing light with an advance control feature is used, set control to OFF position. On SSI coils, a terminal is provided for tachometer connection.

Check or adjust ignition timing with engine at normal operating temperature, distributor vacuum hose disconnected and engine running at specified RPM.

Fig 1: 1975-77 Firing Order & Timing Marks

Courtesy of AMERICAN MOTORS/RENAULT CORP.

Fig 2: 1978-79 Firing Order & Timing Marks

Courtesy of AMERICAN MOTORS/RENAULT CORP.

IGNITION TIMING SPECIFICATIONS ⁽¹⁾

Application

Man. Trans.

Auto. Trans.

1975

232"

5°@500

258"

5°@500

1976

232"

8°@500

258"

6°@500

8°@500

1977

232"

Federal

8°@500

10°@500

Altitude

10°@500

Calif.

10°@500

258"

Federal

6°@500

⁽²⁾ 8°@500

Altitude

10°@500

Calif.

8°@500

1978

232" 1-Bbl.

8°@600

10°@550

258" 1-Bbl.

Altitude

10°@600

10°@550

Calif.

6°@850

8°@700

258" 2-Bbl.

6°@600

8°@600

1979

232" 1-Bbl.

8°@600

⁽³⁾ 10°@550

258" 1-Bbl.

8°@700

258" 2-Bbl.

4°@700

⁽⁴⁾ 8°@600

⁽¹⁾	Settings are BTDC at specified RPM; ±2°, and ±100 RPM.

⁽²⁾	6°BTDC on Matador models.

⁽³⁾	12°@550 RPM on models with 2.37 axle ratio.

⁽⁴⁾	12°@600 on Federal when above 4000 ft.