Any tips or ideas guys? Googled it and dident get much

 

Sorry. 2011 fx4 5.0

 

Check your gas cap.

 

Yes gas cap, or if it's a capless system like mine make sure it's latched.

 

Gas cap is good. I always check it now and there seems to be no problem there. That's the code P0451. I don't know what else the P0455 large leak could be. Not like it's leaking gas on the ground or anything. I don't smell it either.

 

I got an evap system code on mine before, turned out to be a torn boot on my turbo intake but I'm sure that does you no good since you have the 5.0. There's also a small tube on the intake (of mine at least) that always breaks off. Either that or I thought I read it could also be on the charcoal cannister. Either a tube rotted off or electrical connector. If not any of those I'd be out of ideas

 

..

 

broken evap canister under truck?

 

The EVAP canister is under the truck right behind the driver door if I remember correctly. Check and make sure the canister is not broke, the hoses are attached and in good condition.

If you have a one of those Halloween smoke machines, you could smoke test to find a leak. Have heard a cigar will also work but have never tired it.

 

Thanks guys will will looking at all these things and getting back in a couple days!