2000 Silverado Small Evap Leak Detected

[Aaron Wilson]

I have code PO442 for a small evap leak. I built a smoke machine that will produce quite a bit of smoke, but I can't attach it to the schrader valve at the evap service port. So I disconnected the connector at the purge solenoid and attached the smoke line there. I ran the smoker and couldn't find a leak of smoke anywhere in the system. I'm sure I can't do very good diagnostics on this though because my scan tool isn't capable of doing Bi Directional tests. Any Ideas? I was thinking I should see smoke coming from somewhere.