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<h2><span style="font-size: 16px;">What does an idle air control valve do?</span></h2><p><span style="font-size: 14px;">The idle air control (IAC) valve is vital for managing the engine's idle speed by accurately controlling airflow around the <a href="https://a-premium.com/throttle-body">throttle body</a>. This function helps the IAC valve maintain the target idle speed for smooth, stable operation. It also aids cold starts by increasing airflow to enrich the mixture and compensates for extra loads by opening more to sustain the desired idle speed. Additionally, the IAC valve's airflow regulation optimizes the air-fuel ratio to reduce emissions. Problems with the valve can cause drivability issues and increased emissions.</span></p><h2><span style="font-size: 18px;">How to replace the IAC valve?</span></h2><p><span style="font-size: 14px;">To replace an IAC (Idle Air Control) valve, first disconnect the negative battery cable. Locate the valve, typically positioned near the throttle body or intake. Unplug the electrical connector and remove the mounting hardware to take out the old valve, making sure the new part fits properly. Apply dielectric grease to the electrical connector, then install the new IAC valve in the same orientation and secure it. Reconnect the battery, start the engine, and use a scanner to clear any related diagnostic trouble codes. Test drive the vehicle to verify the new IAC valve is operating correctly and maintaining a stable idle. Regularly cleaning the IAC valve helps ensure a consistent engine idle and prevents issues.&nbsp;</span></p><h2><span style="font-size: 18px;">Restoring engine efficiency: A guide to cleaning the idle air control valve</span></h2><p><span style="font-size: 14px;">To clean the idle air control (IAC) valve on a car, first locate the valve, typically near the throttle body, and disconnect the electrical connector to isolate it from the vehicle's electrical system. Then, carefully remove the IAC valve and use a throttle body/carburetor cleaner to spray the exterior and gently scrub the interior passages and openings with a soft-bristle brush or cotton swab dipped in the cleaner, avoiding submerging the entire valve. Inspect the IAC valve for any signs of wear, damage, or excessive carbon buildup, and if severely compromised, it may need replacement rather than cleaning. Carefully reinstall the IAC valve, secure it in place, and reconnect the electrical connector, then start the engine and let it idle to ensure the valve is functioning properly. Regularly cleaning the IAC valve can help improve engine idle performance, fuel efficiency, and emissions, but if the valve is still not operating correctly after cleaning, further diagnosis or replacement may be necessary.</span></p><h2><span style="font-size: 18px;">Steady and reliable, worry-free driving: A-Premium IAC valve</span></h2><p><span style="font-size: 14px;">A-Premium idle air control (IAC) valve combines advanced engineering and premium manufacturing to deliver exceptional performance and reliable operation for your vehicle. &nbsp;Precision internal architecture and rigorous quality control ensure outstanding stability and responsiveness, keeping your engine's idle smooth and your fuel economy and emissions metrics optimized. Alongside our 90-day free returns and 1-year warranty, you can count on our customer service team to be there for you 24/7. Bid farewell to worries and enjoy a reliably smooth driving experience - A-Premium IAC valve is the answer you've been seeking.</span></p>

Idle Air Control Valve

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Air Cleaner

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Air Filter Box

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Mass Air Flow Sensors/Car MAF Sensors | A-Premium

Air Flow Sensor

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Air Intake Duct

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Air Intake Hose

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Air Intake Manifold Actuator Control Solenoid

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Air Intake Manifold Flap Adjuster

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Air Intake Manifold Runner Control Sensor

Air Intake Resonator

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Electric Vacuum Pump

Engine Air Duct Assembly

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Engine Air Filter

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Intake Manifold

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Intake Manifold Flap Actuator

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Intake Manifold Repair Bracket

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Intake Manifold Runner Control Valve

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Intercooler

Intercooler Hose

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Oxygen Sensor

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Pressure Sensor

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Supercharger Pulley Drive Unit

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Supercharger Snout Rebuild Kit

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Throttle Body

Throttle Cable

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Throttle Position Sensor

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Turbocharger

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Turbocharger Gasket Kit

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Turbocharger Oil Line

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Vacuum Pump

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Air Filters & Intake Systems

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Camshaft Adjuster

Camshaft Adjuster Cover

Camshaft Kit

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Camshaft Timing Gear

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Camshafts

Chain Tensioner Adjuster

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Cylinder Head

Cylinder Head Assembly

Eccentric Shaft Actuator

Engine Timing Belt

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Engine Valve Cover

Engine Valve Cover Gasket

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Harmonic Balancer

Rocker Arm

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Rocker Arm Shaft Lifter Assembly

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Timing Belt Kit

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Timing Chain Gear

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Timing Chain Kit

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Timing Cover

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Timing-Control Valve Solenoid

Valve Cover Gasket

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Valve Lifter Guides

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Valve Lifters Tappet

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Cams, Timing & Valvetrain

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Belt Tensioner

Coolant Level Sensor

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Crank Installer Tool

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Crankcase Breather Hose

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Crankcase Breather Valve

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Crankshaft Position Sensor

Crankshaft Pulley

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Engine Oil Dipstick

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Engine Oil Dipstick Tube

Engine Oil Filter

Engine Oil Pan Gasket

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Flywheel

Harmonic Balancer Crankshaft Hub

Knock Sensor

Oil Baffle

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Oil Cooler

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Oil Cooler Line

Oil Drip Pan

Oil Filler Cap

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Oil Filter

Oil Filter Base

Oil Filter Cover

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Oil Filter Housing

Oil Filter Housing Cover

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Oil Level Sensor

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Oil Pan

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Oil Pump

Oil Pump Drive Gear Shaft

Oil Pump Pickup Tube

Oil Separator

Serpentine Belt

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Cranks, Pistons, Oil & Components

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Camshaft Position Sensor

Camshaft Position Sensor & Magnet Kit

Connector Plug

Distributor Cap

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Electronic Ignition System

Engine Valve Covers & Ignition Coils Kits

Glow Plug

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Glow Plug Relay Module

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Ignition Coil

Ignition Coils & Spark Plugs & Wires Kits

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Ignition Coils & Spark Plugs Kits

Ignition Coils & Wires Kits

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Ignition Distributor

Ignition Lock Cylinder

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Ignition Starter Switch

Ignition Switch Actuator

Kill Switch

Knock Detonation Sensor

Relay

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Spark Plug

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Spark Plug Wire

Electronic Control Modules, Ignition & Distributors

Engine Wiring Harness

Intake Manifold Repair Kit

Pulley

Engine Components & Accessories

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Active Grille Shutter Actuator

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Auxiliary Water Pump

Drive Motor Inverter Cooler

Electric Engine Water Pump

Engine Coolant Air Bleeder Valve

Engine Coolant Pipe

Engine Coolant Shut Off Valve

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Expansion Tank

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Expansion Tank Mounting Plate

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Fan Pulley Bracket

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Fuel Cooler

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Overflow Hose Connector

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Engine Cooling

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The engine comprises many essential elements such as the lower cylinder block, upper cylinder head(s), and the cooling & lubricating systems. With A-Premium aftermarket engine components, you can expect that your engine deliver years of reliable performance. We offer a diverse selection of engine components from air filters and ignition coils (kits) to fuel pumps to cater to your needs.

Toyota Highlander Idle Air Control Valve