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2002 Jeep 4.0 EVAP issue. #4725725
04/13/18 12:10 PM
04/13/18 12:10 PM
Joined: Oct 2017
Posts: 579
Northeastern Vermont
littleant Offline OP
littleant  Offline OP

Joined: Oct 2017
Posts: 579
Northeastern Vermont
2002 Jeep 4.0 165,000 miles EVAP issue. About 6 months ago engine light came on. Hooked my scanner and it showed code P0455 perminet code large evap leak and pending code small evap leak P0442. To brutal of a winter so working on it now. Changed the gas cap cheap and easy. Erased codes but came back in 2 weeks. So there is a green cap that says evap test port. Is this used for smoke machine??. Can I put low air pressure say 10 psi through it or will it damage something. Inspection coming up end of month. Thanks guys

Last edited by littleant; 04/13/18 12:22 PM. Reason: spelling

I can't prevent getting old but I REFUSE to grow up.
2010 Mountaineer 4.0
2002 Jeep Wrangler TJ 4.0
Re: 2002 Jeep 4.0 EVAP issue. [Re: littleant] #4725739
04/13/18 12:26 PM
04/13/18 12:26 PM
Joined: Jun 2003
Posts: 18,670
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline

Joined: Jun 2003
Posts: 18,670
Deplorable in apple valley, ca
Check the hoses under the hood. Thats where mine rotted off from.


02 Wrangler carlube 5w30
87 F250 traveler 15w40
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