Diplomat L6-225 3.7L VIN H 1-bbl (1983)
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 cylinder head on 6 cylinder engines.
