Explorer 2WD V6-245 4.0L SOHC VIN E EFI (1997)
Intake Manifold Tuning Valve (IMTV): Description and Operation
Intake Manifold Tuning Valve
The 4.0L SOHC Explorer, 4.6L F-Series, 5.4L E/F-Series and 5.4L NGV have an Intake Manifold Tuning (IMT) valve assembly that increases
mid-range torque of the engine.
Intake Manifold Tuning Valve
The IMT valve is a single valve that blends the air flow of a dual plenum type intake manifold.
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The IMT Valve assembly is a two-position valve located in the intake manifold (as shown).
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The IMT Valve (3) is normally closed at low engine speeds and provides torque improvements by separating intake pulses of a dual plenum
system.
The PCM (2) uses the TP sensor and rpm input signals (1) to determine activation of the Intake Manifold Tuning Valve system.
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Below approximately 3000 rpm, the IMT valve shutter is closed, and above approximately 3000 rpm, the shutter is opened.
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There must be a positive change in voltage from the TP sensor along with the increase in rpm to open the shutter.
The PCM uses the information from the input signals to control the IMT valve based upon rpm and changes in throttle position.
When commanded on by the PCM, the valve opens up the end of the vertical separating wall at high speeds to allow both sides of the manifold to
blend together to provide air flow tuning on the dual plenum system.
