Your engine shakes, surges, or feels uneven while sitting at a stop or idling. A rough idle usually points to ignition, fuel, or air problems that throw off the engine's balance.
Find a ProviderA mild rough idle won't cause immediate damage, but the underlying cause — like a misfire or vacuum leak — can worsen and harm components over time.
Cold rough idle is often normal as the engine warms up, but if it lasts too long it can mean worn plugs, a weak sensor, or a fuel mixture issue.
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