Originally Posted by RegDunlop
sounds like you have a leak somewher in the fuel line, or the fuel pressure regulator, ...did you try and get the code checked, it could be something more serious/complicated like a sensor going bad causing too much fuel to go in the mix and remain unburned, which could also possibly contaminate the engine oil and make it so thin it will no longer provide effective lubrication and cause the engine to seize..
If it is a newer ( post 96) vehicle go to autozone pepboys or advance auto and have them read the code ....its' free
also make sure the gas cap you bought is the right size, if you can get an OEM one
If it has an evaporitive emissions fault it will have nothing to do with the fuel supply so this info is not correct.
The common problems are as follows:
Sticky purge valve or leak detect pump. I doubt this is your problem because you smell gas,; the aformentioned problems usually do not emit vapors to the atmosphere, they go into the engine.
Gas cap, which you changed. As previusly mentioned make sure it is the correct cap.
More than likely you have a cracked hose or a cracked charcoal canister.
Been 4 wheeling lately or hit anything this winter?
Check the hoses from the tank to the charcoal canister and the lines from the canister to the purge valve.
I tend to think something is either broken/cracked because you can smell the vapor. Your nose should point you in the right direction.
Have you had a fuel pump,sending unit or fuel tank replaced lately? It possible that the seal for the fuel pump is no seated correctly, which usually causes a leak as soon as you fill up the tank (obvious gas on the ground).
Just so you know a little on WHEN this test runs:
The engine has to be cold ( coolant temp must be within 5 degrees of ambient temp )
Fuel must be betweeen 1/4 and 3/4
Vehicle must be running with no interuptions until the test is complete or it will not see the results as valid( 2 or 3 minutes ).
This info is good on Mopar vehicles until aprox 06/07 when they started to switch to the natural vacuum method of leak detection ( which takes place when the vehicle is sitting. Theroy being that as the car sits the fuel cools down creating a slight vacuum. This is what the computer looks for in a natural vacuum system )
Hope this helps.
If you find youself in North Jersey on a weekend shoot me a PM and maybe I can look at it for you.