Spark Test
- Using an ohmmeter, check resistance of each spark plug wire. See HIGH TENSION WIRE RESISTANCE table. Check for a strong Blue spark at coil wire and each spark plug wire by holding wire terminal 5/16" ground while cranking engine.
- Disconnect and inspect all related ignition system connectors and harness. Clean or repair as necessary. If okay, remove negative battery cable. Disconnect secondary and primary leads from ignition coil.
- Using ohmmeter, check resistance between primary terminals of coil. Check secondary resistance between coil secondary terminal and primary positive terminal. Replace coil if readings are not within specifications. See IGNITION COIL RESISTANCE table.
HIGH TENSION WIRE RESISTANCE
| Application |
Ohms |
| Vanagon |
| Coil Wire With Connectors |
1200-2800 |
| Spark Plug Wire/Connector |
4600-7400 |
| Spark Plug Connector |
4000-6000 |
| Suppressor |
600-1400 |
| All Other Models |
| Coil Wire Only |
* |
| Coil Wire With Connector |
1600-2400 |
| Spark Plug Wire/ Connector |
4000-6000 |
| Suppressor |
600-1400 |