How to Increase Car Engine Idle RPM

Introduction

The idle speed of a car engine is the speed at which the engine runs when the car is not moving. The idle speed is typically set between 600 and 800 rpm, and it is controlled by the idle air control valve (IACV).

There are several reasons why you might want to increase the idle speed of your car engine. For example, you might want to do this if your engine is idling too low and is causing the car to stall. You might also want to increase the idle speed if you have installed a new camshaft or other performance modifications that require a higher idle speed.

How to Increase Car Engine Idle RPM

There are two ways to increase the idle speed of your car engine:

1. **Adjust the idle air control valve (IACV).** The IACV is a small valve that controls the amount of air that bypasses the throttle plate. By adjusting the IACV, you can increase or decrease the idle speed.
2. **Adjust the throttle stop screw.** The throttle stop screw is a screw that limits the amount that the throttle plate can close. By adjusting the throttle stop screw, you can increase or decrease the idle speed.

Adjusting the Idle Air Control Valve (IACV)

The IACV is typically located on the intake manifold. It is a small, round valve with a wire connector attached to it. To adjust the IACV, you will need a screwdriver and a wrench.

1. Disconnect the wire connector from the IACV.
2. Use the screwdriver to turn the idle speed adjustment screw clockwise to increase the idle speed or counterclockwise to decrease the idle speed.
3. Reconnect the wire connector to the IACV.

Adjusting the Throttle Stop Screw

The throttle stop screw is typically located on the throttle body. It is a small screw that is located near the throttle linkage. To adjust the throttle stop screw, you will need a screwdriver.

1. Use the screwdriver to turn the throttle stop screw clockwise to increase the idle speed or counterclockwise to decrease the idle speed.

Tips for Increasing Car Engine Idle RPM

Here are a few tips for increasing the idle speed of your car engine:

* **Start by making small adjustments.** Don’t make large adjustments to the idle speed all at once. Start by making small adjustments and then test the engine’s idle speed.
* **Use a tachometer to measure the idle speed.** A tachometer is a small device that measures the engine’s rpm. This will help you to ensure that you are making the correct adjustments.
* **Be careful not to over-adjust the idle speed.** If you over-adjust the idle speed, the engine may stall or run rough.

Conclusion

Increasing the idle speed of your car engine is a simple procedure that can be done in a few minutes. By following the steps outlined in this article, you can easily increase the idle speed of your engine to the desired level.