Some applications with fuel injection or a tachometer need a voltage spike signal from the negative side of the coil before they will operate properly. This signal changes when a high inductive storage or capacitive discharge electronic ignition control is installed. The Fuel Injection and Tachometer Adapter develops a voltage spike that will run most fuel injection systems, voltage triggered tachometers and current (series) triggered tachometers. The Fuel Injection and Tachometer Adapter works with any inductive storage or capacitive discharge electronic ignition control triggered by points or electronic amplifier trigger.