Different components need to work together in order for your Infiniti Q45's engine to function and to reach its maximum performance. One of these essential components is the ignition coil, which is in charge of relaying power from the battery to the spark plugs. The spark plugs then ensure fuel combustion, which makes it possible for your car to run. So when you start to have problems with your ignition coil, be sure to act on them immediately. Because although your Infiniti Q45 ignition coil is built to last a long time, things can still go wrong, and your ignition coil might still fail. Here are some of the common issues that could lead to or are caused by ignition coil failure:
Stalling is particularly noticeable when the car is at idle. There are many likely reasons why it happens, and one of which could be faulty wires in the ignition coil. Test your ignition coil with a multimeter to be sure if it is really the root of the problem. You would have to disconnect the wirings attached to it, so you could measure its resistance level. There are two coils that comprise the ignition coil, and each has a different resistance level from the other. Usually, the secondary coil has a higher voltage because it consists of more windings. If the resistance level displayed on the multimeter does not reach the normal figures, you would have to replace your ignition coil.
A dead ignition coil is one of the most probable causes of engine failure. It is incapable of transporting current to the spark plugs, so the engine fails to start or suddenly stops. In this case, you could test the ignition coil with a multimeter or manually assess its condition. You only need to hold the spark plug wire using insulated pliers and then touch the threaded part of the spark plug to a good grounding spot in the engine. If a bright blue spark appears, your ignition coil is fine. Otherwise, it is clearly not working.
An overheated ignition coil is often caused by weakened insulating properties of the coil windings, the coil housing, and the coil tower. Because large amounts of current run through the ignition coil regularly, the insulation in the said components deteriorates over time and eventually causes overheating.