Asked by: Cindy Vilchitsky
automotive auto parts

Can you clean the idle air control valve?

Last Updated: 5th March, 2020

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Spray the unit with choke/carburetor cleaner and use a cleaning rag to remove all carbon buildup from the idle air control valve. Work the spindle back and forth to clean away all deposits found there. Also clean the throttle body while the butterfly valve is exposed.

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Regarding this, can the idle control valve be cleaned?

Cleaning an idle air-control valve can keep you from buying a new part, but only certain idle air-control valves can be cleaned. The idle air-control valve must have a spring-operated valve for cleaning to make it work.

Also, how do you test a idle air control valve? To check if an idle control valve is working properly, start by turning on your engine and letting it run for a minute or 2. Then, when it's at an idling speed, take note of the RPMs in your car. Next, turn the engine off and disconnect the idle control motor under your hood.

Secondly, what are the symptoms of a bad idle air control valve?

Usually a bad or failing idle control valve will produce a few symptoms that can alert the driver of a potential issue.

  • Irregular idle speed. One of the most common symptoms associated with a problematic idle air control valve is irregular idle speed.
  • Check Engine Light comes on.
  • Engine stalling.

How do I reset my idle air control valve?

Reset the IAC valve pintle position by performing the following:

  1. Depress the accelerator pedal slightly.
  2. Start the engine and run for 5 seconds.
  3. Turn the ignition switch to the OFF position for 10 seconds.
  4. Restart the engine and check for proper idle operation.

Related Question Answers

Toumani Amosa

Professional

Where is idle control valve located?

The idle air control valve (IAC) is located near the throttle body of the intake manifold in most cases. Additional designs include rubber hoses running from the throttle body and air intake tube to a remote valve.

Khatima Moletotov

Professional

What causes idle to go up and down?

The idle is controlled by the idle air control valve and if it cannot keep the engine idling it will keep trying to rev the engine up to compensate. A vacuum leak, sensor that has failed, or an EGR system malfunction could potentially be the cause of the erratic engine you're experiencing.

Dilan Quistelli

Explainer

How do I reset my idle speed?

To reset the IAC valve pintle position proceed as follows:
  1. Block the drive wheels, then apply the parking brake firmly.
  2. Start the engine, then hold the engine speed above 2,000 rpm.
  3. Turn the ignition OFF , then restart the engine and check for proper idle operation.

Nadjat Catala

Explainer

How can I tell if my throttle position sensor is bad?

Symptoms of a Bad or Failing Throttle Position Sensor
  1. Car won't accelerate, lacks power when accelerating, or accelerates itself.
  2. Engine won't idle smoothly, idles too slowly, or stalls.
  3. Car accelerates, but won't exceed a relatively low speed, or shift up.
  4. Check Engine Light comes on, accompanied by any of the above behaviors.

Bran Xavary

Explainer

How much does it cost to clean an IAC valve?

$79.99 - $89.99. The job of an idle air control valve is to regulate the car's idle based on how much air gets into the engine. This is done through the vehicle's computer system and then sends the information to the components.

Essaddik Appleton

Pundit

Does cleaning your throttle body make a difference?

In summary, you can clean the throttle body all you like, but the fact is, if your engine is worn, your intake and throttle body will continue to get dirty. Cleaning your throttle body likely won't do anything to solve an idle problem. It might make you feel better, but it might do little to solve an idle problem.

Nordin Ellacuria

Pundit

Can I clean a throttle position sensor?

Cleaning the throttle body itself can be done using carburetor fluid and a clean cloth for the removal of light sludge. During this process, the throttle position sensor should not be cleaned due to the possibility of contamination or wire damage.

Oumar Starp

Pundit

What causes an idle air control valve to go bad?

A faulty idle air control (IAC) valve can cause a number of problems with your vehicle: 1. Incorrect idle speed: An IAC valve that sticks in the closed position will create an idle speed that's too low. On the other hand, an IAC valve that sticks in the open position will create an idle speed that's too high.

Fermin Kauffer

Pundit

Can you clean a idle control valve?

Spray the unit with choke/carburetor cleaner and use a cleaning rag to remove all carbon buildup from the idle air control valve. Work the spindle back and forth to clean away all deposits found there. Also clean the throttle body while the butterfly valve is exposed.

Iudita Gordeev

Pundit

What will a bad throttle position sensor do?

What happens when my throttle position sensor goes bad. When a TPS goes bad, then the car's throttle body won't function properly. It could either stay shut or it won't close properly which is a severe issue. If it stays shut then your engine is not going receive air and it won't start.

Rodayna Chartorijsky

Teacher

Can idle control valve cause misfire?

The engine may be stalling because it isn't getting enough throttle opening. The cause is often a problem in the idle air control system. The first thing to check is the intake vacuum with a vacuum gauge. An EGR valve that is leaking can also act like a vacuum leak and cause a random misfire.

Sharif Porelo

Teacher

What causes rpms to fluctuate at idle?

When the engine is warmed up, I notice that the RPM needle varies from 700 to 900rpm. Erratic engine idle can be caused by various factors, but the most common and likely cause is a dirty or malfunctioning Mass Air Flow (MAF) sensor.

Tahirou Antwerp

Teacher

Will a bad IAC cause loss of power?

The same happens with the power steering, which also uses electricity and increases the load in the IAC. Eventually, it will stop working and prevent the engine from working correctly. You may not experience a completely stalled engine, but a significant loss in RPM, which is another clear sign the IAC is faulty.

Yannick Paar

Teacher

What does an IAC valve do?

An idle air control actuator or idle air control valve (IAC actuator/valve) is a device commonly used in fuel-injected vehicles to control the engine's idling rotational speed (RPM). In carburetted vehicles a similar device known as an idle speed control actuator is used.

Jeneva Lodowicks

Reviewer

How do I change my IAC valve?

Part 1 of 1: Replacing an idle control valve.
  1. Materials Needed.
  2. Step 1: Disconnect the battery.
  3. Step 2: Locate the valve.
  4. Step 3: Disconnect the wiring harness.
  5. Step 4: Remove the old idle control valve.
  6. Step 5: Clean the seat.
  7. Step 6: Install the new valve.
  8. Step 7: Reinstall the wiring harness.

Syuzanna Samudio

Reviewer

What RPM should my car idle at?

For a passenger car engine, idle speed is customarily between 600 and 1000 rpm. For medium and heavy duty trucks, it is approximately 600 rpm. For many single-cylinder motorcycle engines, idle speed is set between 1200 and 1500 rpm. Two-cylinder motorcycle engines are often set around 1000 rpm.

Neil Kool

Supporter

Where is the throttle position sensor located?

Throttle Position Sensor (TPS) Repair Guide
Fig. The Throttle Position (TP) Sensor is located on the rear of the intake manifold. The Throttle Position (TP) Sensor is located on the bulkhead, above the accelerator pedal. The Throttle Position (TP) Sensor is located on the bulkhead, above the accelerator pedal.

Cristopher Banhudo

Supporter

How do you install a idle air control valve?

To install:
  1. Lubricate the IAC valve O-ring (3) with clean engine oil.
  2. Install the IAC valve assembly (2).
  3. Install the IAC valve attaching screws (1).
  4. Reconnect the IAC connector.
  5. Use the following procedure to reset the IAC valve pintle position.
  6. Turn ON the ignition, with the engine OFF.

Assan Preuhs

Supporter

Why is my car revving high on its own?

The most common cause of this revving is either a stuck throttle or the mass airflow (MAF) sensor. This fault should be addressed as soon as possible for normal operation as this revving can become dangerous if the vehicle is allowed to accelerate unintentionally.