Last Updated on December 10, 2022 by tawhid

If your car has been idling roughly or stalling, it might be time to check or replace your idle air control valve. Also known as an IAC valve or idle speed control valve, this component is responsible for managing the engine’s idle speed. It does this by regulating the amount of air that bypasses the throttle when the vehicle is idling.

A faulty IAC valve can cause all sorts of problems, from a simple stumble on startup to a complete stall while driving.

If you unplug the idle air control valve on your car, the engine will no longer be able to regulate its own idle speed. This means that the engine will either run too fast or too slow, and it may even stall. In some cases, unplugging the IACV can also cause damage to the engine.

Idle Air Control Valve Stuck Open Symptoms

An idle air control valve that is stuck open will cause your engine to idle erratically or stall. The most common symptom of a stuck IAC valve is an engine that stalls when you come to a stop. Other symptoms include:

– Erratic/high idle – Stalling at stoplights or stop signs – Hesitation when accelerating from a stop

If your car has these symptoms, it’s important to get it checked out by a mechanic as soon as possible. A stuck IAC valve can cause serious damage to your engine if left untreated.

What Happens If You Unplug Idle Air Control Valve


Can You Unplug Idle Control Valve?

An idle control valve, also called an idle air control valve, is a device that helps your engine maintain a consistent idle. The valve is usually located on the side of the engine and is controlled by a computer. The computer tells the valve when to open and close based on inputs from sensors in the engine.

You should not unplug the idle control valve unless you are instructed to do so by a mechanic or dealer service department. If you unplug it, your engine may run erratically or stall.

What Happens If Idle Air Control Valve is Stuck Open?

If the idle air control valve is stuck open, it will cause the engine to run too lean at idle. This can lead to stalling, hesitations, and rough running. It can also cause the check engine light to come on.

How Do You Reset Your Idle Air Control Valve?

An idle air control valve, also called an IAC, adjusts the engine’s idle speed. It does this by regulating how much air enters the engine. The IAC is located between the throttle body and intake manifold.

The IAC consists of a pintle and seat. The pintle is attached to a motor that opens and closes the valve. When the engine is idling, the IAC allows just enough air to enter the engine to keep it running.

When you step on the gas pedal, the IAC quickly opens wider to allow more air into the engine so that it can increase its speed. Over time, carbon can build up on the pintle and seat, causing the valve to stick open or closed. This can cause your engine’s idle speed to be too high or low.

If your car’s idle speed is not within specifications, you may need to reset your IACValve. To reset your IAC Valve: 1) Remove any dirt or debris from aroundthe valve with a clean cloth or brushto ensure good contact when you reconnect it.

. 2) Unplugthe electrical connector fromthe back ofthe valve..

3) Using atiny screwdriveror other pointy object, press down onthe tab inthe centerofthethe valvewhile pullingoutonvalve itself(Youmayneedto wiggleit alittlebit). Be carefulnot topress toohardand breaktab off! You should feelalittle clicking sensationas tab depressesthen releaseswith eachpress.

. 4) Whileholdingvalvedown with tool (now inopen position), blowany remainingdebris outof hole with compressedair.. Ifyou havecarburetorcleaneravailableyou may wanttocleanIAC pasagewayby spraying someinto hole then cyclingvalveopen/closedafewtimes until cleanerresidueis blownout as well.. 5) Reversethe abovedepressingprocessto reinstallvalve making surethat O-ringsealat baseof valvestaysintactand in place..

Do You Need an Idle Air Control Valve?

The idle air control valve is an important component in a vehicle’s engine. It helps to regulate the amount of air that flows into the engine when the vehicle is idling. This allows the engine to run smoothly and prevents it from stalling.

If your idle air control valve is not working properly, it can cause your engine to stall or run rough at idle. If you notice these symptoms, it is important to have the problem diagnosed and repaired as soon as possible. In some cases, a faulty idle air control valve may also cause your check engine light to come on.

This Is What Happens When You Delete Idle Air Control (Iacv)


If your car’s idle air control valve is broken or not functioning properly, it can cause a variety of problems. Your car may stall, run rough, or have a hard time starting. It can also cause your check engine light to come on.

If you notice any of these symptoms, you should take your car to a mechanic to have the idle air control valve checked or replaced.

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