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<h2>What does a throttle body&nbsp;do?</h2>
The throttle body acts as a valve between the air intake system and the engine's intake manifold. It controls the flow of air into the engine. When you press the accelerator pedal, the throttle body opens, allowing more air to enter, which in turn increases engine power. Inside the throttle body, there is a throttle plate that can rotate. When you press the accelerator, it opens to allow more air in. Releasing the accelerator causes the throttle plate to close, reducing the airflow.
The throttle body plays a crucial role in controlling the engine's idle speed. When the vehicle is at a standstill or moving at low speeds, the throttle plate may be partially closed to limit the amount of air entering the engine. This helps maintain a stable and efficient idle.&nbsp;By adjusting the position of the throttle plate, the engine control unit (ECU) can regulate the air-fuel mixture to optimize performance and fuel efficiency. When you need more power, the throttle plate opens wider to allow more air for combustion.
<h2>How to clean a throttle body?</h2>
<h3>Tools needed:</h3>
<ul>
<li>Screwdriver or socket set</li>
<li>Throttle body cleaner</li>
<li>Clean cloth or paper towels</li>
<li>Safety glasses and gloves</li>
</ul>
<h3>Steps:</h3>
<ol>
<li>Safety Precautions:</li>
</ol>
<ul>
<li>Ensure the engine is cool.</li>
<li>Wear safety glasses and gloves.</li>
<li>Disconnect the battery.</li>
</ul>
<ol start="2">
<li>Locate the Throttle Body: Find it between the air intake hose and the intake manifold.</li>
<li>Remove Air Intake Tube: If needed, detach the air intake tube to access the throttle body.</li>
<li>Inspect and Clean: Use a throttle body cleaner to spray and clean the throttle plate and interior surfaces. Wipe away residue with a cloth.</li>
<li>Reassemble: Reattach the air intake tube and reconnect the battery.</li>
<li>Start and Test: Start the engine and take it for a test drive to ensure smooth operation.</li>
</ol>
Remember to use a cleaner designed for throttle bodies and avoid abrasive materials.

Throttle Body

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Air Filter Box

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Air Flow Sensor

Air Intake Duct

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Air Intake Hose

Air Intake Manifold Actuator Control Solenoid

Air Intake Manifold Flap Adjuster

Air Intake Manifold Runner Control Sensor

Electric Vacuum Pump

Engine Air Duct Assembly

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Engine Air Filter

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Intake Manifold

Intake Manifold Flap Actuator

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Intercooler

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Oxygen Sensor

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Pressure Sensor

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Throttle Position Sensor

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Turbocharger

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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

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Camshaft Timing Gear

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Camshafts

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Engine Valve Cover

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Harmonic Balancer

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Timing Belt Kit

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Timing Chain Kit

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Timing Cover

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Timing-Control Valve Solenoid

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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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Crankcase Breather Hose

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Crankcase Breather Valve

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Crankshaft Position Sensor

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Engine Oil Dipstick Tube

Engine Oil Filter

Engine Oil Pan Gasket

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Flywheel

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Oil Cooler

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Oil Cooler Line

Oil Filler Cap

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Oil Filter

Oil Filter Base

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Oil Filter Housing

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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

Cranks, Pistons, Oil & Components

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Camshaft Position Sensor

Camshaft Position Sensor & Magnet Kit

Connector Plug

Distributor Cap

Engine Valve Covers & Ignition Coils Kits

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Glow Plug Relay Module

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Ignition Coil

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Ignition Coils & Spark Plugs Kits

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Ignition Distributor

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Ignition Starter Switch

Ignition Switch Actuator

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

Engine Components & Accessories

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Auxiliary Water Pump

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Expansion Tank

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Expansion Tank Mounting Plate

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Fuel Cooler

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Radiator

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Radiator Hose

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Radiator Support Assembly

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Temperature Sensor

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Turbo Hose

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Water Coolant Pipe

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Water Outlet

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Engine Cooling

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Engine Mount

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Engine Mounts

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Catalytic Converter

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EGR Valve

Emissions Fluid Pump

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Exhaust Fluid Heater

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Exhaust Gas Temperature Sensor

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Exhaust Manifold

Fuel Tank Breather Valve

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Fuel Vapor Leak Detection Pump

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Nitrogen Oxide Sensor

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Secondary Air Injection Check Valve

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Vapor Canister Vent Solenoid

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Exhaust & Emission Systems

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Fuel Filter

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Fuel Injection Control Module

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Fuel Injection Pressure Regulator

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Fuel Injector

Fuel Injector Kit

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Fuel Injector Module Wiring Harness

Fuel Line Kit

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Fuel Pump

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Fuel Sending Unit

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Fuel Tank Filler Neck Pipe

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Fuel Tank Strap

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High Pressure Fuel Pump

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Idle Air Control Valve

Mechanical Fuel Pump

Oil Pressure Relief Valve

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Fuel Systems & Components

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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.

1998 BMW 740i Throttle Body

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