The Coil is another important part of the cars electrical system and it creates the high voltage current that is required by the spark plugs. Coils can often need replacing after 100,000km and Lilydale Auto Electrics keeps a wide range of coils in stock. A failing coil can cause miss-firing, the engine can run roughly or stop completely. A coil problem can sometimes seem intermittent with the car running well for a few kilometres before again causing problems.
Earlier model cars have one coil to supply the voltage required for the spark plugs. Later model cars can have 2 or more coils depending on the number of cylinders.