Intake Manifold Tuning Valve - LS, Sable & Taurus 3.0L (VIN S), Econoline & Pickup 4.6L (VIN W), & Blackwood 5.4L 4VPC (VIN A)

WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2003 Mercury Sable, 2003 Mercury Mountaineer, 2003 Mercury Marauder, 2003 Mercury Grand Marquis, and 2003 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.

Intake Manifold Tuning Valve (IMTV) is an electric actuator mounted directly to intake manifold. IMTV operates a shutter device attached to electric actuator shaft. When electric actuator is energized, it rotates shaft and opens shutter, allowing both sides of the manifold airflow to blend together. See Fig 1-Fig 4 .

There is no monitor feedback to PCM from IMTV to indicate shutter position (open or closed). PCM uses a positive change in throttle position sensor along with the increase in engine RPM from crankshaft position sensor to open shutter.

When engine speed is below 2600 RPM, electric actuator will not be energized, allowing IMTV shutter to remain in closed position (no airflow blend occurs). When engine speed is 2600 RPM or more, electric actuator is initially energized at a 100 percent duty cycle, causing shutter to open position (airflow blend occurs). Duty cycle then falls to about 50 percent duty cycle to continue to hold shutter open.

Fig 1: View Of Intake Manifold Tuning Valve System

Courtesy of FORD MOTOR CO.

Fig 2: Identifying Intake Manifold Tuning Valve System - Blackwood 5.4L 4V (VIN A)

Courtesy of FORD MOTOR CO.

Fig 3: Identifying Intake Manifold Tuning Valve System - Econoline & Pickup 4.6L (VIN W)

Courtesy of FORD MOTOR CO.

Fig 4: Identifying Intake Manifold Tuning Valve System - LS, Sable & Taurus 3.0L (VIN S)

Courtesy of FORD MOTOR CO.