An ignition coil (also called an ignition coil) plays a crucial role in your engine's ignition process. When a coil fails, you'll often notice it immediately in  your car's behavior . The sooner you recognize it, the better – because driving with a faulty coil can lead to more serious engine damage.

What exactly does a coil do?

A coil converts the low voltage from the battery into the high voltage needed to fire the spark plug. Without a good spark, there's no combustion – and therefore no smooth-running engine.

Symptoms of a broken coil

✔️  Stuttering or hesitation when accelerating
The engine runs irregularly and feels as if it is 'hesiting' when accelerating.

✔️  Idling rough or shaking
The engine runs irregularly when you are stationary – often with noticeable vibrations.

✔️  Engine runs on fewer cylinders
If one or more ignition coils fail, the engine will not run on all cylinders.

✔️  Less power and poor throttle response
The car feels sluggish and reacts delayed to the accelerator pedal.

✔️  Increased fuel consumption
Incomplete combustion causes the ECU to try to supply more fuel.

✔️  Check engine light (check engine)
Often a malfunction light appears in combination with error codes such as  misfire detected .

Is it dangerous to continue driving?

Yes. Continuing to drive with a broken coil can lead to:

• Damaged spark plugs

• Unburned fuel in the catalytic converter (which can destroy it)

• Poor lubrication and higher engine temperatures

Replacement is often simple and affordable – and prevents a lot of misery.

Advice from JT Products

At  JT Products  , you'll find  high-quality ignition coils  for virtually every brand. We supply only parts tested for reliability and performance – even for tuned or heavily loaded engines.

Not sure if your coil is faulty? Contact us – we're happy to help with technical advice or a replacement part.