Auto Repair Encyclopedia
Ignition Coil Replacement
Sometimes referred to as Ignition Coil, Replace Ignition Coil, Ignition Coil Replace
The ignition coil generates the "spark" required to ignite gasoline. The ensuing explosion is part of the process the engine uses to create power. Older vehicles use only 1 ignition coil and a distributor to distribute the spark to each cylinder in the engine. Most modern vehicles use one ignition coil per engine cylinder. The ignition coils on these vehicles are located directly on top of the spark plug.
To replace the ignition coil, the electrical connection to the coil is disconnected and the hardware securing the ignition coil to the valve cover or manifold is removed. On some vehicles, it may be necessary to remove the intake manifold to gain access to the ignition coils.
About this Repair: Ignition Coil Replacement
Why this happens
A failed ignition coil can be the result of failures elsewhere in the ignition system. The ignition wires and spark plugs should be inspected and replaced if necessary.
Oil or coolant leaks can damage ignition coils, and the leaks need to be repaired along with the ignition coil.
Failing ignition coils can cause the engine to run roughly or to lack power when accelerating.The Check Engine Light will often flash when the engine is misfiring, and continuing to drive under these conditions can damage the catalytic converter.
