What is an air intake valve?

What is an air intake valve?

The idle air control (IAC) valve is located on the throttle body of fuel-injected engines, where it works with the vehicle’s ECU to electrically regulate airflow to the engine to ensure smooth idling.

How is the IAC connected to the throttle body?

The IAC may be part of the throttle body or connected to the intake via a smaller intake hose, off the main intake hose. After intake air passes through the throttle body, it passes into the intake manifold, a series of tubes that delivers air to the intake valves at each cylinder.

How are air intake manifolds used in engines?

Simple intake manifolds move intake air along the shortest route, while more complex versions may direct air along a more circuitous route or even multiple routes, depending on engine speed and load. Controlling air flow this way can make for more power or efficiency, depending on demand.

Where does the air go after the throttle body?

After intake air passes through the throttle body, it passes into the intake manifold, a series of tubes that delivers air to the intake valves at each cylinder.

How old are the throttle hoses on a car?

These are the hoses from the lower portion of the throttle body to the IAC valve and from the IAC valve to the middle of the upper intake plenum. Notice how they feel like hard plastic? They shouldn’t. They should be pliable.Your hoses are 24 to 30 years old. Notice the cracks at the ends? They gave up their useful life a long time ago.

Is the throttle body part of the intake manifold?

Often an intake manifold holds the throttle valve (throttle body) and some other components. An intake manifold consists of the plenum and runners, see the photo. In some V6 and V8 engines, an intake manifold can be made of several separate sections or parts.

How does air flow through the intake manifold?

The intake air flows through the air filter, intake boot (snorkel), then through the throttle body, into the plenum, then through the runners and into the cylinders (see diagram). The throttle valve (body) controls the engine rpm by adjusting the amount of air flow. Intake air flow.

What makes up the throttle body and idle air?

IAT – Intake Air Temperature – Measures the temperature of the air the engine is intaking. IAC – Idle air control – Controls the amount of air the engine is intaking while it is idling. Throttle body – Responsible for regulating flow of air into the engine as you press the gas pedal.

These are the hoses from the lower portion of the throttle body to the IAC valve and from the IAC valve to the middle of the upper intake plenum. Notice how they feel like hard plastic? They shouldn’t. They should be pliable.Your hoses are 24 to 30 years old. Notice the cracks at the ends? They gave up their useful life a long time ago.