Intake Manifold Runner Control (IMRC) actuator (6.8L [3V] only)
WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
The air induction system improves engine performance by using the IMRC as follows:
- The intake manifold has 2 runners per cylinder, feeding each of the intake ports in the cylinder heads.
- The IMRC assemblies are located between the upper intake manifold and cylinder heads, providing 2 air passages for each cylinder.
- The valve plates are opened and closed by the IMRC electric actuator, which is controlled by the PCM.
- One air passage is always open and the other passage switches from closed to open by means of a valve plate.
- Below 1, 500 rpm, this valve plate is closed to improve fuel economy and emissions.