EVAP smoke test

[Bababou]

I need the help of the Subaru gurus again.  I have replaced all the vacuum lines from the charcoal canister across the thermostat housing and into the intake, along with the EGR and solenoid lines and from the vacuum pump down to the T that goes to the trans and ant back fire solenoid.  I did spot one line just right of the intake that needs replacement as its breaking apart at the connection.   After changing that line out I plan to run a smoke test to look for any leaks i may have missed.  The system checked out at 96% efficiency at the emissions station so not a huge leak.  Is there a preferred point to start the smoke into the system?  All the videos I can find are for newer systems with an actual check valve.

 

https://ibb.co/jpQ0Mp

[skishop69]

There is a gas cap adapter. I would use that, turn on the smoke and pull a few of the front lines to let it through the system faster then reconnect those lines when you see smoke come out. give it a couple more minutes then use a really bright flashlight to check all the lines and tank on the vehicle. A dimly lit are works best. Don't do it outside. Any breeze will blow the smoke away before you can see it. If you can't get the adapter, T a line up front and remove the gas cap until you see smoke.

Edited September 27, 2018 by skishop69

[Bababou]

Would leaving the two large house clamps on the intake boot / hose cause an EVAP leak?  I realized today I had failed to tighten them back down before going for the first emissions test.  The one at the filter box and the one at the throttle body to be specific.

[skishop69]

No. they are not part of the EVAP system.

 

[Bababou]

I realized today it was the pressure test on the tank not the evap system that failed.  I have to find a shop to test it, I use a home made smoke can and I don't trust it going right to the tank.