Why Is My Car Idling Rough? Causes, DIY Fixes, and When to Call a Mechanic

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RPM fluctuations and a rough idle are frequently caused by carbon buildup choking the air intake. Before spending money on diagnostics, you can often smooth out the idle yourself in under 15 minutes by spraying a dedicated Throttle Body and Air Intake Cleaner to remove the sticky carbon deposits. A rough idle can feel small

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