Skylark V6-173 2.8L VIN Z 2-bbl HP (1982)
Distributor Thermal Vacuum Switch: Description and Operation
Distributor Spark/Canister Purge TVS
DS-CP-TVS
Valve Contains Two Separate Vacuum Circuits
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Two Upper Ports--Sealed from each other when cold and connected to each other when warm.
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Two Lower Ports--Sealed from each other when cold and connected to each other when warm