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Message: <blockquote data-quote="ttocs" data-source="post: 1459359" data-attributes="member: 11896"><p>I was going to say to check the cap when I started reading as I had a similar problem in a ranger years ago.  I went to go pass emissions and I was confused when they failed me because my gas cap did not seal correctly.  So then I go to the store and tell them I need one and they ask if I want one sealed or vented?  Well I guess sealed if its leaking?  I thought this was odd because I had known my truck had a leak on the top of the gas tank for years.  You could see it between the cab/bed and I would just fill it till I saw the top was wet.  So then I put the new gas cap on and go back and somehow passed the test.....  Modern cars see if the tank has a leak and will throw a code.</p></blockquote><p></p>