Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMAZDA1991929 BASEREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROLS - ADJUSTMENTSIGNITION TIMINGEXCEPT RX7NAVAJO
1991 Mazda 929 Base
Except RX7: Navajo
1991 Mazda 929 BaseSECTION Navajo
- Engine is equipped with Electronic Distributorless Ignition System (EDIS). Base (initial) timing is preset at 10 degrees BTDC and is not adjustable. To check base timing, turn ignition off.
- Disconnect Spark Angle Word (SAW) in-line connector in Yellow/Light Green wire near EDIS module, in right front corner of engine compartment. Start engine.
- Connect timing light and check timing. If ignition timing is not at 10 degrees BTDC, see appropriate TESTS W/O CODES and appropriate G -TEST W/ CODES articles in the ENGINE PERFORMANCE section. Turn off engine. Connect SAW in-line connector.
IGNITION TIMING SPECIFICATIONS
| Application | Man. Trans. | (1) Auto. Trans. | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| B2200 | |||||||||||
| Carbureted | 6@825 | 6@825 | |||||||||
| PFI (2) | 6@750 | 6@770 | |||||||||
| B2600i (2) | 5@750 | 5@770 | |||||||||
| Miata (2) | 10@850 | 8@850 | |||||||||
| MPV | |||||||||||
| 2.6L (2) | 5@750 | 5@770 | |||||||||
| 3.0L (2) | 11@800 | 11@800 | |||||||||
| MX-6 & 626 | |||||||||||
| Non-Turbo (2)(3) | 6@750 | 6@750 | |||||||||
| Turbo (2) | 9@750 | 9@750 | |||||||||
| Navajo | (4) | (4) | |||||||||
| Protege | |||||||||||
| DOHC (2) | 10@750 | 10@750 | |||||||||
| SOHC (2) | 5@750 | 5@750 | |||||||||
| 323 (2) | 7@750 | 7@750 | |||||||||
| 929 | |||||||||||
| DOHC (2) | N/A | 8@700 | |||||||||
| SOHC (2) | N/A | 15@650 | |||||||||
|
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RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.