13 Reasons Cars' RPM Goes UP and Down at Idle ( And Easy Fixes)

Piston Post November 5, 2025
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Video Description

#automaintenance #automotive #roughidle #roughidlecauses When your RPM goes up and down at idle, it’s not just an inconvenience—it’s a sign something’s wrong. In this video, we reveal 13 common rough idle causes, from vacuum leaks and dirty throttle bodies to bad sensors and fuel system issues. Whether you're dealing with a slight vibration or full-on stalling, understanding what’s behind your car’s rough idle can save you time, money, and avoid costly breakdowns. Idle jumps up and down Engine idles up and down RPMs jumping while idle RPM goes up and down Car idle goes up and down Idle going up and down Car revving while idle Car revving on its own Truck revs up and down at idle RPM Fluctuations While Idling Why is my car idling up and down? Why does my idle go up and down? Why is my idle going up and down? Car revving on its own when stationary Why is my car revving on its own in park? Car revving up and down in park Why is my car idle going up and down? Engine revs up and down while idling Why does my RPM go up and down while parked? RPM going up and down while idle Why does my engine rev when idle? hy does my truck idle up and down? Why is my truck idling up and down Why does my car rev up and down while idling? My car revs up and down when I start it. When I start my car, the RPM goes up and down. Why does my RPM go up and down at idle? #automaintenance #carmaintenancetips #carcare #carcareservices

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