Inline Spark Tester With Coil-On-Plug Wire Manufacturer: LISLE SKU: LS 20580 Manufacturer part number: 20580 UPC: 083045205807 Call for pricing Qty: Buy Now Custom wishlist OK Add to wishlist Add to compare list Email a friend Gives a Visual Check of Spark Energy for Coil-On-Plug or Standard Ignition Systems.Connect the tool between the spark plug and the plug wire.The short wire is double ended to offer a straight boot and a 90-degree boot on one tool.With the engine running, the tool flashes a mirror image of the ignition spark.The additional 7" extension plug wire is used on coil-on-plugs that are recessed and hard-to-reach. Overview Attachments Reviews Gives a Visual Check of Spark Energy for Coil-On-Plug or Standard Ignition Systems.Connect the tool between the spark plug and the plug wire.The short wire is double ended to offer a straight boot and a 90-degree boot on one tool.With the engine running, the tool flashes a mirror image of the ignition spark.The additional 7" extension plug wire is used on coil-on-plugs that are recessed and hard-to-reach.