Engine Controls - Basic Testing: Spark
- Crank engine. Check for a strong Blue spark at each spark plug wire by using a high output spark tester. Verify resistance of each spark plug wire is 4000-7000 ohms per foot.
- Unplug and inspect all related ignition system connectors and harness. Clean or repair as necessary, and recheck spark. If still no spark, go to IGNITION COIL POWER SOURCE.