BMW 323i Ignition Coil
Knowing if Your BMW 323i Ignition Coil Has Problems
Ignition coils are as important as the spark plugs or any other component in your BMW's ignition system. Each BMW 323i ignition coil in your car's 6-cylinder engine works to amplify the battery's 12 volts to a lot higher voltage. This brings about the fire that is necessary to ignite the fuel needed to get the car going. The coils are built to last a long time, but since they are constantly exposed to high currents of electricity and high temperatures, they tend to wear out eventually. And when they do start to get bad, you will experience a few symptoms of problems that will signal the need to get new ones as soon as possible.
This is very common when the spark plugs are gapped way too far from each other, resulting in additional voltage that makes the spark jump from one electrode to another. This arrangement strains the coils because of the additional load of current. It heats them up and causes them to expand and contract every time. This process decreases the reliability of the coils and also causes malfunctions.
Sluggish speed and rough running
Coils that are on the brink of expiration can still provide some current to the spark plugs. But, this will no longer be enough and will result in slow speeds. There is also the possibility that the current may be inconsistent, causing intermittent sparks that will make your BMW run like an old clunker.
Stalling and stopping
Your car needs a continuous supply of sparks to keep running. If your ignition coils are failing, you will experience stalling while on the road. You will be able to notice this when there is a sluggish response when you step on the accelerator. Also, if the ignition coils completely fail while driving, the car will stop working altogether. This is going to be a major problem especially if you are driving through the Interstate.
Your BMW 323i will not even start with a completely failed ignition coil. This is because the energy needed by the spark plugs to fire up the fuel does not reach them anymore.