Top 10 REASONS Your Engine Revs Up And Down at Idle | RPM Fluctuations While Car Is Driving

#engine #engine_rpm #idle
When your car idles, the engine speed measured in RPMs, should stay relatively constant. But if it starts fluctuating, it could indicate an underlying issue. In this video, we explain the most common reasons why car RPM revs up and down at idle.
The most common reasons of car RPM fluctuations are vacuum leaks, a faulty idle air control valve, a bad MAF sensor, throttle position sensor issues, a bad fuel injector, a bad spark plug, EGR valve problems, air filter issues, a bad fuel pump, or a bad coolant temperature sensor.

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Chapters:
00:00 Introduction
00:40 Vacuum Leaks
01:03 Faulty Idle Air Control Valve
01:23 Mass Air Flow Sensor Problems
01:40 Throttle Position Sensor Issues
02:02 Faulty Fuel Injectors
02:17 EGR Valve Problems
02:41 Faulty Spark Plugs or Ignition System
02:58 Dirty Air Filter
03:13 Bad Fuel Pump
03:29 Bad Coolant Temperature Sensor

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Disclaimer:
This video is for educational purposes only. We are not in the auto repair business nor publish automotive service manuals. This video is not reviewed or authorized by any vehicle manufacturer. This video is intended only as general guidance. Every system is slightly different, so refer to the owner’s manual of your vehicle for any specific information about your model. Remember that only proper service and repair procedures will ensure your car's safe and reliable operation.

Copyright Disclaimer:
Copyright Disclaimer Under section 107 of the Copyright Act 1976, allowance is made for “fair use” for purposes such as criticism, comment, news reporting, teaching, scholarship, education, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational, or personal use tips the balance in favor of fair use.

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