i didnt know were to post this so i put it here. on my thirdgen if i fill my car to full then drive it to E and go to the pump to fill it, i have a problem getting the gas cap off. when i finaly get the cap to turn it seems like there is a huge vacuum in the tank.i know that there is supposed to be pressure in the tank but this is like hooking a vacuum cleaner to my tank and leeving it on. i dont know but it seems like this shouldnt be happening

 

check your vent tubing for restrictions. had the same problem with mine turned out somehow the vent got pinched and was causing the tank to build up vacuum as the fuel pump sucked the fuel out of the tank

 

thnx ill try that