Seeking PO446, P0440 Code solutions!!!

[19963.4lsr5]

Depending on your environment the gasket surfaces of the gas tank rust.

That will also cause the EVAP leak codes.


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[Augoose]

Depending on your environment the gasket surfaces of the gas tank rust.

That will also cause the EVAP leak codes.


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Thanks. I'm hoping I can avoid dropping the fuel tank but who knows. The remainder of the 4Runner is spotless - no rust, been treated very well. Based on how clean things are underneath, I'd be shocked if the top of the tank is in bad shape.

 

[19963.4lsr5]

Thanks. I'm hoping I can avoid dropping the fuel tank but who knows. The remainder of the 4Runner is spotless - no rust, been treated very well. Based on how clean things are underneath, I'd be shocked if the top of the tank is in bad shape.

My 97 SR5 build and repair thread shows the process. My tank looked pretty good for the rust belt but rust was measlesing under the rubber gasket. I had to drop it to weld a new lower control arm mount on. I had seen a few threads where that was the source of the vacuum leak and decided to preemptively redo both rubber gaskets.


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[Augoose]

Just a quick follow up - still no CEL. Hopefully the leaking o-rings on the charcoal canister was the issue.

 

[michaelmike]

I did a refurb on my canister in June of 2017 and was easy. Cut it open, checked filter, replaced granules, plastic welded shut with a soldering iron. Easy. Pictures suck but never seen anyone else post a refurb so here goes:
2001 4Runner canister refurb - Google Photos

Where did u get replacement fill and is there a spec on amount

 

[Clifford]

I got a high quality dense charcoal for aquariums on Amazon. No spec on fill. You cannot overfill it is just pushing the vapors through the media.