Hello all, I have had my car recently serviced for evap, and 2 solenoids were replaced related to evap cel. I'm still having codes (large leak) and I feel like this mechanic is taking advantage of me, I would like to try to treat the problem myself.

Can anybody give some guesses where there are common evap (large) leaks that would trigger cel? I don't have a smoke machine, can you rent those?

Thanks!
J