Quote:
Originally Posted by william lam
wow thats a lot of cars... sorry to sound dumb but what is plenum and vis?
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Have a read of this, it may shed some light on the subject.
http://www.themgzs.co.uk/vb/showthread.php?t=84
Plenum is the plastic top section of the inlet manifold, it houses the plenum chambers and the vis motors are two units that control the power valve assembly and the balance valve assembly. This controls the opening and closing of said valves and controls the power and torque spread by the ecu. A common feature seen across various other manufacturers.