small evap leak?

[Astro14]

An indie near me did that... replaced purge valve... code is back.

I'll be working on this further myself, it'll be a couple three weeks before I can get to it.

More often, it’s the j-hose…which I would think would show up in the smoke test.

[albertj]

Thanks, and I should be able to check that. I'll need to get/rent a smoke machine, I think. I wonder if this one would actually work:

https://www.ebay.com/itm/115265811970

[jgadbois]

I get the evap small leak code a couple times a year. Using VIDA/DICE, I cycle the purge valve 3 or 4 times and it is good for another 6 months.

[albertj]

I **finally** found the leak. Rear wheels off, the aluminum vapor piping near the fuel filler.

Sheesh.

Albertj

[bg2128506]

How does the EVAP smoke test intend to work? Is the system supposed to be sealed?

I.e., I connect the smoke machine at #27 (at the purge solenoid hose towards rear).
I replaced leaking #6 (canister to purge shut-off valve).

Before that I had both major and minor EVAP leaks. Now I have only minor. Smoke now comes out of #19 (vapor canister filter, above the rear right wheel, right below filler neck) which has an opening (plastic neck) at the bottom.

If I plug that opening with my finger, the pressure builds up until it comes out of filler cap (which I am going to replace).

But, #19 that vapor canister filter is fully open: you can blow in or out, it's not a valve.

Now, if pressure relieved either out of filler cap or vapor canister filter, there is no way the negative pressure can be maintained in the tank (i.e. this is what small leak mean) as it will be immediately lost through the #19 filter.

Or does it indicate that shut-off valve #5 is bad and should normally be closed?
vbvb