Distributor Vacuum Modulator Valve (DVMV)

This valve has a calibration point of 8.7 inches Hg. Whenever the manifold or ported vacuum is less than 8.7 inches, the DVMV switches to full manifold vacuum. Whenever manifold or ported vacuum is greater than 8.7 inches Hg, the DVMV switches to the highest vacuum, either ported or manifold.