2.7L goes whacky after fill up. Help

every time i fill up my gas tank my taco takes a good 20 seconds to start and then once it start it idles at 200-350 rpm until the fuel needle is all the way at the top. any ideas of what is causing this???

 

Blocked gas cap air vent? The vent is designed to let air INTO the tank but not OUT.

Maybe it sticks until there's enough of a vacuum to overcome the initial stiction?

But in that case, you'd have a prob first thing in the morning.

Do you fill right up to the filler neck?

The fact that the symptom occurs at fill up still makes me suspect gas cap.

 

sounds like a fuel filter. Id also run some injector cleaner through the gas as well.

 

x2^^^^^^^^^^^

 

ill check out the gas cap. just changed the little rubber gasket on the inside of the cap maybe i can pul it apart and service the inside???

 

i had this problem, It would also do it if the truck sat in the sun for a while. It is the vapors from the gas going from the tank into the engine. My FREE fix:

Get under the truck, there is a vent line comming from the top of the gas tank..pull it off. The gas no longer vents into the charcoal canister but directly into the air. Not epa friendly, but easily reversable and a quick fix.

 

will it throw a cel if i full the vent line???

 

idk, i get a cel because my charcoal canister is skrewed so im not sure if it throws one or not, all i know is that it works

 

thats what im thinking now