321D (small evap leak) Diag

[Roberth135]

Hey everyone!

I have had 321D code and service engine soon light on my 135. I already bought a new gas cap and it didn’t go away.

Finally got around to buy a smoke tester to diagnose where the leak is coming from.

I disconnected the purge valve and put the smoke tester in the line that goes under the throttle body, but all the smoke came out of the charcoal canister because if I understand correctly it is vented to atmosphere while the car is not running.

What is the proper procedure to smoke test the evap system?

Thanks