All these suggestions are good, so let'* focus on this from the basics and move forward, since you have already inspected and repaired your vacuum lines. I do suggest you pull the vapor cannister and inspect it for cracks and/or leaks and also check to see if it smells like gas. Any of those three mean you need a new cannister and possibly a new purge valve solenoid.
So, DTC P0440
- Is set if one or more of the following conditions are met:
- A stuck or closed EVAP purge solenoid,
- A stuck open EVAP vent solenoid,
- A disconnected or damaged EVAP purge line or vent hose
- A leaking fuel cap
- A leaking fuel fill neck
Here'* a picture of my EVAP vapor canister (outside of the car, lol). It is normally located under my Airbox and PCM case in my '97. I believe that yours should be in a similar spot.
The purge solenoid
is the rectangularish valve on top of the cannister. The valve that Ron350 pointed out to you in your picture is the vent solenoid
. Check these per Echo'* instructions above.
Check these items and then get back to us.
Mike: 1997 SE w/ 183K, aka White Horse
, Gutted Airbox w/K&N, drilled 180* t-stat, tint all around, clear corners w/SilverStars, "PONTIAC" light up tail, PEMs, NGK TR55s