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.
1990 Mazda 929 BaseFACTORY OEM SERVICE PROCEDURE
Ignition Coil Resistance
- Remove primary and secondary leads from ignition coil. Using ohmmeter, check primary resistance between positive and negative terminals of coil. Resistance should be as specified in IGNITION COIL RESISTANCE table. If not, replace ignition coil. See Fig 1 .
- Check secondary resistance between (positive) terminal and coil tower. See IGNITION COIL RESISTANCE table. If not within specifications, replace coil.
IGNITION COIL RESISTANCE (EXCEPT RX7) - Ohms @ 68°F (20°C)
| Application | Primary | Secondary | ||
|---|---|---|---|---|
| B2200 (Carbureted) | 1.0-1.3 | 6000-30,000 | ||
| B2200 (Fuel-Injected) & B2600i | .81-.99 | 6000-30,000 | ||
| Miata | .78-.94 | 11,200-15,200 | ||
| MPV | ||||
| 2.6L (4-Cyl.) | ||||
| Right Side | .77-.95 | 6000-30,000 | ||
| Left Side | .90-1.1 | 6000-30,000 | ||
| 3.0L (V6) | .81-.99 | 6000-30,000 | ||
| MX-6 & 626 | ||||
| Non-Turbo | .77-.95 | 10,300-13,900 | ||
| Turbo | .72-.88 | 10,300-13,900 | ||
| Protege & 323 | .81-.99 | 10,000-16,000 | ||
| 929 | .72-.88 | 10,000-30,000 | ||
RX7 IGNITION COIL/IGNITOR RESISTANCE
| Application | Ohms |
|---|---|
| RX7 | 0.0-1.0 |
CAUTION:
While checking the ignitor, disconnect connector from the ignition coil.
Factory Service Tools
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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.
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