Manufacturer's Part Number:
Dorman Inline Spark Checkers
Summit Racing Part Number:
Checks and Tests Ignition:
Checks and Tests Coil:
Checks and Tests Rev Limits:
Checks and Tests RPM Switch Operation:
Checks and Tests Shift Level RPM:
Checks and Tests Tachometer Accuracy:
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These Dorman inline spark checkers are designed to check for bad spark plugs and weak spark plug wires. The frequency and intensity of light indicate the spark condition, letting you know if there's a problem.