Been smelling gas odor lately from under the hood while driving on trails. Did a little investigating and I think it's coming from around the Charcoal Canister. Read several threads on it but don't have an FSM. Can anybody enlighten me on testing the canister?
I think I have most of this memorized as I've worked to address a tank pressure issue, but here is the real deal from the FSM:
to check for clogged filter or check valve:
1.05 psi air should blow into tank port and out the other ports with no resistance
holding drain port closed, 0.28 psi air should blow into purge port and out via the tank port
cleaning filter in canister:
blow 43 psi air into tank port wile holding purge port closed
checking VCV operation (hose connects between purge port on canister and VCV)
on COLD engine, disconnect purge hose and check for NO air suction at idle and 3000rpm
on HOT engine, disconnect purge hose and check for NO air suction at idle, but it SHOULD have suction at 3000rpm
Since our canisters cost $$$$, I ordered one of these that I'll be testing this week/month to collect good data for comparison. It took me a while to find a cheap alternative that works in the same fashion, basically the same size, with almost the same hose size, etc. Of course, mounting is not the same.
