Cutlass Cruiser V8-260 4.3L VIN 8 2-bbl (1982)
Vacuum Spark Delay Valve: Description and Operation
Delay Valve Trapped Spark (DV-TS)
PURPOSE
The DV-TS--located in the vacuum line between the carburetor and the distributor advance unit--controls exhaust emissions by delaying vacuum
advance during some acceleration modes.