Ignition Coil: Testing and Inspection

Ignition Coil Inspection

NOTICE: "Cold" and "Hot" in the following sentences express the temperature of the coils themselves. Cold is from - 10°C (140°F) to 50°C (122°F) and Hot is from 50°C (122°F) to 100°C (212°F).

1. DISCONNECT DISTRIBUTOR CONNECTOR
2. REMOVE DISTRIBUTOR CAP AND ROTOR
3. REMOVE IGNITION COIL DUST COVER





4. INSPECT PRIMARY COIL RESISTANCE
Using an ohmmeter, measure the resistance between the positive (+) and negative (-) terminals.

Primary coil resistance:
Cold 0.38 - 0.55 Ohms
Hot 0.45 - 0.65 Ohms

If the resistance is not as specified, replace the ignition coil.





5. INSPECT SECONDARY COIL RESISTANCE
Using an ohmmeter, measure the resistance between the positive (+) and high-tension terminals.

Secondary coil resistance:
Cold 9.0 - 15.4 K ohms
Hot 11.4 - 18.1 K ohms

If the resistance is not as specified, replace the ignition coil.

6. REINSTALL IGNITION COIL DUST COVER
7. REINSTALL DISTRIBUTOR CAP AND ROTOR
8. RECONNECT DISTRIBUTOR CONNECTOR