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- - Evap Leak (https://www.ford-trucks.com/forums/829423-evap-leak.html)

Flareside50

03-08-2009 07:24 PM

Evap Leak

Whats up guys, hey so I'm driving home today and the sevice engine soon light comes on. I check the code and its a PO4055 Evap System Large LEak. and the possible things could be either the fuel cap, vaccum leak, the canister is not working or broken or not plugged in, or the purge valve went bad. Any ideas of where to start looking and where is the canister and the purge valve located. Thanks

KingRanchMan02

03-09-2009 09:06 AM

The canister is back under the bed and near the spare tire. The purge vent valve is under the hood. Good luck! :-wink

Flareside50

03-09-2009 09:43 AM

Thanks well I took the negative battery terminal off and waited for a few just to see if the gas cap wasn't on tight so Ill let u guys know.

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