F 350 2WD Super Duty V10-6.8L (2009)
Variable Induction Position Sensor: Description and Operation
Electronic Engine Controls
Intake Manifold Runner Control (IMRC) Sensor (6.8L 3V)
The 6.8L air induction system improves engine performance by using the IMRC as follows:
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The intake manifold has 2 runners per cylinder, feeding each of the intake ports in the cylinder heads.
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The IMRC assemblies are located between the upper intake manifold and cylinder heads, providing 2 air passages for each cylinder.
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The valve plates are opened and closed by the IMRC electric actuator, which is controlled by PCM.
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One air passage is always open and the other passage switches from closed to open by means of a valve plate.
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Below 1,500 rpm, this valve plate is closed to improve fuel economy and emissions.
For removal and installation, refer to Intake Manifold Runner Control (IMRC) Actuator - 6.8L See: Fuel Delivery and Air Induction/Variable Induction
System/Variable Induction Control Actuator/Service and Repair.
