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How do I adjust the idle RPM in my car?
Lately, my Honda CRV is idling high. It seems to be running fine, but the gas mileage is really suffering. I need to know how to adjust the idle RPM before things get worse. So, how can I adjust the idle RPMs in my car?
Lynell Spencer · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
A change in idle performance is common as cars get older—fortunately, it is a pretty easy fix. You can adjust the idle RPM by locating and turning the screw on the throttle body.
Here is a step by step guide on how to adjust idle RPM:
- Start your car,pop the hood, and allow it to warm up completely. You will make this adjustment with the car running. Make sure to avoid contact with hot engine parts.
- Follow the air intake hose from the air filter to the throttle body. On the throttle body, look for a screw (possibly covered by a plastic cap). Pry the plastic cap off if it is still engaged.
- Disconnect the idle air adjustment valve by locating and disengaging the electronic connector that holds it to the throttle body.
- Turn the idle screw to adjust the idle—turn the screw to the left to increase the RPM or to the right to lower it.
- When you have adjusted the idle—aim for 650 RPM—reconnect the idle air adjustment valve’s electrical connection. Lower the hood and turn your car off.
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- Gregory R.
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