Fifth Avenue V8-318 5.2L VIN R 4-bbl (1986)
Air Injection Control Valve: Description and Operation
Coolant Controlled Engine Vacuum Switch (CCEVS)
The CCEVS is used to improve hot driveability by preventing the operation of air injection switching system after coolant temperature reaches a
predetermined level. The CCEVS valve is mounted in the intake manifold on V8 engines.
