Where is the intake manifold runner control on a 2002 ford f150 4.2L engine?

The 2002 Ford F-150 4.2L engine doesn't have an intake manifold runner control (IMRC) system in the traditional sense like some V8 engines of that era. The 4.2L uses a simpler, less sophisticated intake design. There's no electronically controlled actuator or vacuum-operated system to vary runner length.