P0442 small evap leak

BlackBrick · Post by **BlackBrick** » 18 Sep 2018, 10:28

Just wanted to share this with all those chasing down evap leak codes, like 0445 and 0442.

Def check/replace all hoses, J hoses, roll over valve, etc. Those are the main things that affect it. I was getting 0445 until I fixed these.

But the small leak, code 0442, kept creeping up after doing all that. what eventually fixed it?

Got some 600 sandpaper and sanded down the metal filler neck until it was nice and smooth. Even with a new gas cap, I was not getting a perfect seal. I guess 20 years of the gas pump nozzle nicking the filler neck caused enough imperfections to cause a small evap leak!

WhatAmIDoing · Post by **WhatAmIDoing** » 18 Sep 2018, 14:42

Great idea, but how did you prevent particulates from falling down into the filler neck, so that they would not make it into the fuel tank?

BlackBrick · Post by **BlackBrick** » 18 Sep 2018, 17:42

not too worried, there's more #hit in actual gasoline. That's what fuel filters are for.

jenkinskg · Post by **jenkinskg** » 19 Oct 2018, 11:34

Another note, do not use cheap autozone fuel cap.
It causes leak to show even after it is fixed