Ignition Coil: Testing and Inspection

Coil Testing:

1. Measurement of the primary coil resistance.
Disconnect the four wire coil connector and measure the resistance between the positive terminal and negative terminals of the ignition coils.
Standard value: .70 - .86 ohm

2. Measurement of the secondary coil resistance.
Measure the resistance between the ignition coil's high-voltage terminals.
Standard value: 11.3 - 15.3 k-ohm


3. If primary and secondary coil resistances are not within specifications replace coil. If coil resistances are within specifications check power transistor.