Just fixed my po449 code. Bought the "vapor canister vent valve" from Napa. Part# 600-1627. Cost was 94.99 they sold it to me for "garage cost" at $77.99. This valve is connected to the filter. I just uncoupled the one clip, turned the solenoid 40 deg and pulled it out. This is located at the front of the gas tank, drivers side frame. Very easy fix for a BS system. Everyone's solenoid is normally open and when u start the vehicle it closes for vacuum purposes. My solenoid was bad so it was venting all the time. I also bought a foot of 5/8" hose and connected it to the charcoal cannister on the tank. So nothing is moved. I blame the failure on a POS Mexico made solenoid. I ain't buying the relocation thing.