Ignition Coil Resistance

Remove necessary components and disconnect electrical connector from ignition coil. Disconnect spark plug wire from ignition coil.
Using ohmmeter, check ignition coil primary resistance between ignition coil positive (+) and negative (-) terminals. These are the terminals that electrical connector was installed on. See Fig 1 and Fig 2. Replace ignition coil if primary resistance is not within specification. See IGNITION COIL RESISTANCE table.
Using ohmmeter, check ignition coil secondary resistance. See Fig 1 and Fig 2. Replace ignition coil if secondary resistance is not within specification. See IGNITION COIL RESISTANCE table. Reinstall connector on ignition coil.

IGNITION COIL RESISTANCE

Application

Primary

Secondary

Cold ⁽¹⁾

.70-.94

10,800-14,900

Hot ⁽²⁾

.85-1.10

13,100-17,500

⁽¹⁾	Cold is with temperature of 14-122°F (-10-50°C).

⁽²⁾	Hot is with temperature of 122-212°F (50-100°C).

Fig 1: Measuring Typical Ignition Coil Resistance - Primary

Fig 2: Measuring Typical Ignition Coil Resistance - Secondary