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#4725725 - 04/13/18 12:10 PM 2002 Jeep 4.0 EVAP issue.
littleant Offline


Registered: 10/10/17
Posts: 407
Loc: 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


Edited by littleant (04/13/18 12:22 PM)
Edit Reason: spelling
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#4725739 - 04/13/18 12:26 PM Re: 2002 Jeep 4.0 EVAP issue. [Re: littleant]
Chris142 Offline


Registered: 06/05/03
Posts: 16950
Loc: Deplorable in apple valley, ca
Check the hoses under the hood. Thats where mine rotted off from.
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