What Does a Spark Plug Do?
Spark plugs ignite the fuel in your petrol engine. A Cranbourne West specialist explains why they matter.
What it is & what it does
A spark plug delivers the electric spark that ignites the air/fuel mixture in each cylinder of a petrol engine, many times a second. Modern plugs use long-life materials but still wear with use.
Worn plugs are one of the most common causes of poor running.
Signs of trouble & how we help
Worn or fouled plugs cause misfires, rough idle, hard starting, hesitation and poor economy. Replacing them at the right interval with the correct type keeps the engine smooth.
We fit the correct plugs to the right gap and torque, and check the coils while we’re there.
Questions about your car? Just ask.
Understanding what’s under the bonnet makes servicing decisions easier — and we’re always happy to explain what your car needs and why, in plain English.
Book a service or a check with a Cranbourne West specialist online in 60 seconds, or call 03 8782 0711.
What Does a Spark Plug Do? — FAQ
It provides the spark that ignites the air/fuel mixture in a petrol engine.
Depends on type — often 60,000–100,000 km. We’ll confirm for your car.
Misfires, rough idle, hard starting, hesitation and poor economy.
No — diesels use glow plugs for cold starting; the combustion is by compression.
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