15
Coil Test - KV Test
(Requires Optional Adapter)
1. Unplug the Spark Pickup from the multimeter.
2. Connect the KV adapter to the multimeter.
3. Connect the Spark Pickup to the RPM input on the adapter.
4. Connect the ground lead to a good engine ground.
5. The capacitive pickup can be clipped on the spark plug wire
being tested, or held against the wire with your hand.
6. Access the KV test on the multimeter by pressing the Coil
Button three times.
If KV is low for one or more cylinders the cause could be:
• Open Plug Wire at the Coil (KV will be very low
downstream of the open)
• Narrow or Fouled Plug Gap
• Rich Mixture
If KV is High for one or more cylinders, the cause could be:
• Open Plug Wire at the Plug (KV will be very high upstream
of the open)
• Wide Plug Gap
• High Resistance in Plug or Wire
A momentary high KV reading could be an indication of an ignition
miss. The following graphic will show how to use the bargraphs.
LED Segment is
Momentarily ON
LED Segment is
Momentarily OFF
LED Segment is
Always ON
Peak
Firing KV
Average
Firing KV
Minimum
Firing KV
