@youyoutan3: RPM going crazy? Engine shaking at idle? Car randomly stalling? This little IAC valve might be worth checking! Carbon buildup can restrict airflow and affect how smoothly your engine idles. Locate the IAC valve Inspect for carbon buildup • Clean it with the appropriate cleaner • Reinstall and check engine performance Sometimes a small component can cause some seriously frustrating problems! Save this video for your next DIY car check.#carlife #cartok #cartips #cartools #carmaintenance