Engine Misfire: Causes and Fixes
A misfire makes the engine stumble, shake or flash the check-engine light. A Cranbourne West specialist explains what causes misfires and why fixing them quickly matters.
What a misfire feels like
A misfire is when a cylinder doesn’t fire properly. You’ll feel a stumble, shake or hesitation, often worse at idle or under load, and usually get a check-engine light — a flashing light means an active misfire that can damage the catalytic converter.
A flashing engine light is a “reduce power and get it checked soon” signal.
Common causes
The usual culprits are ignition (worn spark plugs or failing coils), fuel (dirty or faulty injectors), air (vacuum leaks), or compression issues. Reading which cylinder is misfiring and the live data quickly narrows it down.
Carbon build-up on direct-injection engines can also cause misfires over time.
Why fix it fast
Beyond the rough running, a sustained misfire dumps unburnt fuel into the exhaust and can destroy the catalytic converter — an expensive part. Fixing the misfire early is far cheaper.
Engine light flashing or car running rough? Book a diagnosis and we’ll pinpoint the cylinder and cause.
Engine Misfire: Causes and Fixes — FAQ
Ignition (plugs/coils), fuel (injectors), air (vacuum leaks) or compression issues. Carbon build-up can contribute on direct-injection engines.
A flashing check-engine light means stop driving hard and get it checked — an active misfire can wreck the catalytic converter.
We read the fault codes and live data with dealer-level tools to identify the cylinder and confirm the cause.
Often it’s a plug or coil — cheap. Ignoring it and damaging the catalytic converter is the expensive outcome.
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Engine running rough?
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