Keep your engine's vacuum-controlled components switching on cue with the Standard Ignition Ported Vacuum Switch (PVS16). This temperature-sensitive vacuum switch installs as a direct-fit replacement across a wide range of 1973–1982 GM cars and trucks, including the 1973 Ford Torino, 1974–1977 Chevrolet C10 Suburban, 1975–1981 Chevrolet Camaro, 1975–1982 Chevrolet El Camino, and 1979–1981 Buick Century. With 123 applications, see the Buyer's Guide tab for the full list.
A ported vacuum switch that sticks, leaks, or no longer responds to temperature can disrupt vacuum-controlled functions. If a failed ported vacuum switch is the cause of symptoms like a rough or unstable idle, poor warm-up behavior, or an emissions concern, this replaces it. Diagnose the vacuum circuit before replacing, since these symptoms can have other causes. Manufacturer part number PVS16.
What does a ported vacuum switch do?
It senses engine coolant temperature and opens or closes vacuum passages, routing the ported vacuum signal to temperature-dependent components such as the distributor vacuum advance or EGR valve.
Will the PVS16 fit my vehicle?
It is a direct-fit replacement for the listed applications, spanning many 1973–1982 GM cars and trucks. Check the Buyer's Guide tab to confirm your exact year, make, and model.
What are signs this switch may need replacing?
Signs that may point to a faulty ported vacuum switch include a rough or unstable idle, poor warm-up drivability, or an emissions concern. Diagnose the vacuum circuit first, as these can have other causes.
How is the ported vacuum switch controlled?
By engine coolant temperature. As the engine warms, the switch changes state to open or close its internal vacuum passages, altering the vacuum signal sent to the connected components.
Some models list separate year ranges — why?
Certain models fit only specific year spans with gaps between them. Always verify your exact year against the Buyer's Guide tab rather than assuming a continuous range.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
