Gas overflow when filling at pump

Our 06 GT does it too sometimes. That one is the vent system. I tried cleaning it, but the wife said it didn't change. I'll have to try the cansiter on both vehicles.

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Possible fix!

My 07 EL was doing the same thing on fill up. When the pump clicked off the gas would start spewing out. Today I took the lower rubber filler pipe off (between the tank and the metal middle section of the filler pipe) and replaced it with a check valve from Home Depot and some hose and hose clamps from Orielly's. Went back to Costco where the problem began about 10 months ago and not a drop jumped out at me, not even a burp, bubble, splash...
Note: You may be tempted, but don't chop up your original hose just yet, go buy a different hose to graft in a check valve to test if this fixes your problem. If it doesn't you'll be glad you still have your original hose. Make sure the hose is rated for fuel, not as important if this is just temporary to see if it fixes the problem until you get the final solution like I am doing. Mine is still temporary and I will be finalizing the fix soon. Time permitting I will post the final solution if there is enough interest.

Some history:
I had already tried the Evap thing by disconnecting it then driving to Costco to fill up (CEL came on of course). The gas spewed out as usual. I actually took the tank out 3 days ago and inspected everything. The only thing I noticed was that the check valve for the filler pipe in the tank would sometimes get stuck when I pushed it down with a screwdriver it would not always pop back up and close. So I headed to the Internet for more research. Check out the Jeep forum, some good stuff there. I am investigating the GM fix. Post by Ken12 on that forum "Google search on "GM part #15131046" and it showed up at GMPartsDirect.com". For now though my Home Depot $12 check valve was a better fix than a $1000 tank. This is what I am using temporarily with some pipe I got from Orielly's. Check valve: "FlotecSump Pump Inline Check Valve Model # FP0026-10 Internet # 100021846 Store SO SKU # 441622". Hose 1 1/4 inch Inner Diameter. When installing, if you choose to do this, make sure the direction of flow is correct and for me I made sure that the flapper hinge was at the top so gravity would always help it close.

Final fix installed and no more gas overflow

Confirmed today that the GM part (hose with check valve and pipe clamp) can be used to fix this issue. Read on.

Once the GM Part arrived, I simply cut open the GM part and removed the check valve. I also removed the hose clamp from the GM part. I then slid the check valve into the original hose (original hose that attaches to the tank and lower section of the filler pipe) at the end that attaches to the tank. I slid the check valve to the first bend. I made sure that the orientation of the check valve was correct (hinge section at the top and flow direction toward the tank). I then used the hose clamp from the GM part and positioned it over the area that I had placed the check valve. I then tightened the hose clamp so that the check valve could not twist or slide inside the original hose. Once this was complete I installed the original (with check valve modification) hose back onto my 2007 EL. I was at about an 1/8th of a tank and went to Costco for another test run with my final solution. Filled up the tank and no spill whatsoever. I even attempted to top it off a couple times to get it to spit out gas but no problem. I am traveling this summer and will report back if I see any issues. Otherwise I consider this fixed with the pieces I used from the GM part.

Parts you need:
Original hose with hose clamps (1-1/4 inch inner diameter) from your Ford Expedition EL (lower hose on the filler pipe that attaches to the gas tank)
GM Part# 15131046 (Only use the hose clamp and cut out the check valve - you don't need the hose)

For reference to the GM part:
Post by Ken12 on the Jeep forum "Google search on "GM part #15131046" and it showed up at GMPartsDirect.com"

I ordered my GM part from the local GM dealer and it arrived in 2 days.

Follow up!

More than 10 fill ups now, yes lots of miles, and not a single overflow. the GM part fixed the problem for me! Good luck to others!

Just did this same mod to mine the weekend before last. No more gas spewing out when the tank is full.

2005 Freestar

My Ford Freestar does the same thing except mine does it with only a quarter of a tank or even on E it takes me for ever to put gas in my van cause I have to consently stop every couple seconds so my gas don't poor out I have 6 children I can't afford to waste gas

2008 Expedition EL

65K miles and all of a sudden, every time I try to fill the tank, the pump shuts off every one gallon. Also, you can hear air escaping once the fuel pump shuts off. I replaced the charcoal canister but it did not fix the problem. If I disconnect the small vent line going into the rear of the fuel tank, you hear air hissing from tank when you try to fill it. Seems the tank vent system is clogged. Any known service bulletin on this problem?