help! can't fill gas tank!

I'm new member here and I stumbled across this looking for and answer to a problem I'm having with my 2004 Tacoma. During a fill up the filler neck foams up and shuts the pump off about 10 to 15 times every gallon. I pulled the filler neck out and checked the filler tube and vent hose. I didn't bother to check the charcoal EVAP system because those tubes connect to the top of the filler neck and I couldn't see how they would be a problem during a fill up and the check engine light should come on if that system was a problem. I couldn't see anything wrong so I put it back together and still had the problem. Again, I took the filler neck out again and this time I took the rubber tube off the tank that connects to the bottom end of the filler neck. I took a mirror and tried to look into the tank and there is a flap type valve there that I suppose is a rollover valve (I could find no mention of it in the repair manual). It looked a little bent so I stuck a rubber vacuum hose in there to see if it would open and it was stuck. I used a screwdriver and gave it a good push and it opened up and worked freely after that. I put it all together and went to the gas station and had no problem filling the tank. My guess someone tried to steal my gas and put siphon hose in the tank and damaged that valve when removing the siphon hose. The problem is fixed and it was a damaged rollover valve inside the gas tank where the filler neck nipple is.

 

This is interesting. Solid contribution.