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Buick Workshop Service and Repair Manuals

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Distributor Spark Thermal Vacuum Switch (DS-TVS)|Page 2359 > < Distributor Spark Thermal Vacuum Switch (DS-TVS)|Page 2357

Regal Estate Wagon V6-252 4.1L VIN 4 4-BBL (1982)

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Distributor Thermal Vacuum Switch: Description and Operation
Distributor Vacuum Modulator Valve (DVMV)

Distributor Vacuum Modulator Valve (DVMV)

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

Distributor Spark Thermal Vacuum Switch (DS-TVS)|Page 2359 > < Distributor Spark Thermal Vacuum Switch (DS-TVS)|Page 2357