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Hello and thank you for your question,Are you referring to the Intake Manifold Runner Control system?Has the system been scanned for fault codes?
The Intake Manifold Runner Control (IMRC) Electric Actuated system consists of a remote mounted motorized actuator with an attaching cable for each housing on each bank. Some applications will use one cable for both banks. The cable of 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. The housing uses a return spring to hold the butterfly valve plates closed. The motorized actuator houses an internal switch or switches, depending on the application, to provide feedback to the PCM indicating cable and butterfly valve plate position.The most common cause of them failing is in most cases caused by a failing Intake Manifold Runner Control (IMRC) Actuator. In order to determine if in fact that is the case you are going to need to do some testing. See the test steps in the link below, copy and paste the link to your browser to open and view it.https://dl.dropboxusercontent.com/u/104923897/IRMC%20Jun%2013.pdf
Have you ran the test steps I sent you to make sure its getting the signal?