Northstar Engines and System Technical Discussion Discussion, Vacuum diagram in Cadillac Engine Discussion; I need an emission hose diagram for a 2003 cadillac deville....I'd appreciate the much needed help!...
Your EVAP solenoid is attached to the right (rear) side of the TB and the vacuum line, with green test port cap, snakes back under the car to the other parts shown. You crawl under there and trace it all out.
Your PCV clean air line comes from the atmospheric side of the TB to the left (front) cam cover. The PCV dirty air line leaves the right (rear) cam cover and snakes around into the tunnel in the front (passenger end) of the intake manifold.
The AIR vacuum comes from the TB to a solenoid at the right cam cover, where it then branches to AIR valves 1 and 2 - on top of the right cam cover and over next to the water pump cover/lower radiator hose.
Pictures of all that in my albums - the Community tab ^^^, Albums, the red Seville.