BMW 528i Ignition Coil
Symptoms of a Faulty BMW 528i Ignition Coil
Your BMW 528i ignition coil is responsible for one thing-delivering a spark of several thousand volts to the spark plug. Without it, you will have a hard time starting the engine or even keeping it running. When you start experiencing these complications, immediately get your ignition coil looked at.
Poor fuel economy
Because a failing ignition coil is no longer able to provide a high-voltage spark, engine cylinders will miss intermediately or completely. This results into less power and RPM that is normally seen with maximum cylinder combustion. With the engine power reduced, your car will be travelling fewer miles per gallon. This symptom is also accompanied by a noticeable lack of power through all driving ranges.
As a result of less-efficient fuel use, the exhaust's performance will also be affected. You will notice this when you see black fumes that smell of gasoline come out of the system. Before you get caught for "polluting the air," immediately take your car to a mechanic.
If your car is backfiring, this can also indicate that your ignition coil is failing. Engine backfire occurs when unused fuel is emitted through the exhaust system. Not addressing this issue will cause serious damage to the exhaust and will result in costly repairs. If the poor mileage and black exhaust fumes isn't enough to convince you, then a small explosion should.
Difficult to start
Because a bad ignition coil means that the spark plug is no longer receiving the needed amount of charge, you should have a harder time starting up your car. This is especially noticeable when the vehicle is cold or when the weather is very humid.
Aside from your engine backfiring, it can also misfire. When you try to start your car and the ignition coil fails, your vehicle will cough and splutter regularly. When you drive faster, it will suddenly jerk and spit. Your car will also tend to vibrate when the engine is idling.
A faulty ignition coil can result to your car in a stalling condition when the engine is on idle or low-speed operation. If the component cannot recharge fast enough to deliver the needed voltage to the spark plug, the engine can cut out when you push the accelerator pedal.