What is the purpose of intake manifold runner control?

The intake manifold runner control is an engine management component that is found on newer intake manifold designs. It is usually a motorized or vacuum actuated unit attached to the intake manifold, that controls the opening and closing of butterfly valves inside of the intake manifold runners.

How does the intake manifold runner control ( IMRC ) work?

Thanks for the tip, George. The Intake Manifold Runner Control (IMRC) is an electrically actuated system consisting of a motorized actuator with an attaching linkage for each housing on each bank. The linkage attaches to the housing butterfly plate levers. Each IMRC housing is an aluminum casting with two intake air passages for each cylinder.

What’s the difference between IMRC and IMRC tuning valve?

For instance, Ford often calls the device an intake manifold runner control (IMRC) valve, while Chrysler calls the component an intake manifold tuning valve. A problem with the variable intake manifold system, such as a bad IMRC valve, can cause several problems.

What is a variable intake manifold runner valve?

But now, some vehicles have a variable intake manifold (also known as an intake manifold runner control system). The updated design varies the length of the manifold’s runners with the help of an intake manifold runner control (IMRC) valve. The IMRC valve is the part of the intake manifold system that opens and closes the flaps.

Where are the intake air passages on an IMRC?

The linkage attaches to the housing butterfly plate levers. Each IMRC housing is an aluminum casting with two intake air passages for each cylinder. One passage is always open and the other is opened and closed with a butterfly valve plate.

What are signs of bad intake manifold runner control system?

A failure in the intake manifold runner control system can cause several problems. These are some of the most common. Illuminated check engine light: If the car’s computer detects a problem with the system, it will turn on the check engine light. Poor engine performance: An engine needs the right amount of air and fuel to run properly.

Can a variable length intake manifold cause a problem?

The intake manifold runner control system — which often goes by other names, such as a variable length intake manifold — is one such innovation. A failure in the intake manifold runner control system can cause several problems. These are some of the most common.

What is the purpose of intake manifold runner control?