Electronic Ignition (EI) Module With Coil Assembly

Electronic Ignition (EI) Module With Coil Assembly:

Each Electronic Ignition (EI) module (there are two total) is located directly over each cam cover. The electronic ignition system uses a coil over plug design used to eliminate the need for spark plug wires. Each EI module houses three primary coils, three secondary coils as well as three drivers used to supply current to each of the three primary coils. Each secondary coil fires independently of one another solely based on ECM control. The ECM sends a low current 5 volt control signal, which turns On a driver internal to the EI module allowing current to flow to one of the three primary coils. The time the ECM holds the control signal high is called the dwell time. As the ECM turns Off the control signal, the secondary coil will fire out of its secondary tower. The spark will travel down the spark plug boot across the spark plug gap to ignite the cylinder air/fuel charge. The ECM uses 3 independent control signals to fire each cylinder within that specific bank.