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2000 Silverado Small Evap Leak Detected

Deereman
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Deereman Enthusiast

Deereman

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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. 

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