2005 Ford Taurus Engine Controls Vacuum Leakage Noise Possible DTC's

Some 2005 Taurus and Sable vehicles equipped with a 3.0L 2V and some 2003-
2005 Lincoln LS vehicles equipped with a 3.0L 4V engine may exhibit a vacuum
leakage noise or lean codes and/or malfunction indicator lamp (MIL) on. The
cause may be a leak at the 0-ring on the intake manifold tuning (IMT) valve.
ACTION
Follow the Service Procedure steps to correct the condition.
SERVICE PROCEDURE
Verify the concern by removing the IMT valve from the intake manifold and visually
inspecting the 0-ring condition. If the 0-ring is flat or damaged, replace only the 0-
ring not the actuator.
For Lincoln LS, refer to the 2005 Workshop Manual (WSM), Section 303-14, IMT
valve.
For Taurus vehicles, the IMT valve is located on right front of upper intake
manifold:
1. Remove the two (2) retainers.
2. Disconnect the electrical connector.
3. Remove the IMT valve.
NOTE COAT THE IMT VALVE WITH CLEAN ENGINE OIL BEFORE INSTALLING
IT IN THE INTAKE MANIFOLD.
If the IMT valve 0-ring is not the cause, continue with normal diagnosis.

Source