Updated specs are available.
Ignition timing — test mode (NB2 and Mazdaspeed)
This spec doesn't apply to the car you selected.
Not yet checked against the factory manual for your car's year. It's verified in the 2003 Mazda MX-5 Miata Workshop Manual (electronic manual capture); 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture); later manuals may differ.
9–11° BTDC (10 ± 1°) at 750–850 rpm9–11° BTDC (10 ± 1°) at 750–850 rpm
Factory manualTaken from a Mazda factory workshop manual, with page citation.
Procedure
Warm engine to normal operating temperature; fully charged battery. MT in Neutral or AT in P, electrical loads off and cooling fan stopped. Use a timing light on No.1-cylinder ignition lead. Connect TEN to GND / set the factory system selector to SELF TEST as specified by the factory procedure. Align the two pulley marks so that one is at T and one is at 10. Identify the marks by their positions, since aftermarket pulleys can have different paint colors. The factory step names the white mark at T while the value line names the yellow mark. Disconnect the jumper / select CANCEL after the test; the normal-mode 6–18° reading is listed separately.
Applies to
- NB 2001–2005 (BP-Z3) — Other years inferred within NB2 non-turbo family from actual 2003/2005 factory evidence.
- NB 2004–2005 (BP-Z3-TURBO) — Actual2005 factory evidence; 2004 inferred within MSM family.
- Verified in: 2003 Mazda MX-5 Miata Workshop Manual (electronic manual capture); 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture)
Sources (2)
View 2 source citations
- 2003 Mazda MX-5 Miata Workshop Manual (electronic manual capture)Tier 1
Page Engine Tune-Up, Ignition Timing Inspection (PDF p. 567) · Printed value & notes
Page Engine Tune-Up, Ignition Timing Inspection (PDF p. 567)Printed: “Ignition timing BTDC 9°—11° (10° ± 1°) (TIMING MARK [YELLOW])” - 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture)Tier 1
Page Engine Tune-Up, Ignition Timing Inspection (PDF p. 649) · Printed value & notes
Page Engine Tune-Up, Ignition Timing Inspection (PDF p. 649)Printed: “Ignition timing BTDC 9°—11° (10° ± 1°) (TIMING MARK [YELLOW])”