Doesn't let the gas fill easily, keeps shutting off , It takes 10 minuts too filll the tank, Found black pellets in gas line??

Plugged vent line and/or purge canister

Sally, the problem is the charcoal vent system. A new one will cost about $150.00 but......... the total fix will require the cleaning of the vent valve on the gas tank. You will find small pieces of the charcoal (pellet size) in the valve. You must look close to see them. Think pencil lead size. Remove them and exercise the valve some. The valve is a push in and out type. I don't understand the reason the charcoal pellets make their way to the vent valve at the tank but they do because I found them in mine. They must travel out of the canister and up and over a dry loop in the vent line to get to the vent valve at the gas tank. This would take some vacuum to cause the pellets to travel. It also requires the poor construction of the factory instaledl canister vent outlet because there is a filter at the canister that is supposed to contain the pellets. This will verify you have gotten all the charcoal pellets out. The charcoal canister (located up under the fender is easy to replace). You can make a cheep fix by installing some scaring pad material in the vent connection line at the canister but that doesn't address the charcoal being plugged. This will keep the charcoal pellets in the canister.
You will have to drop the gas tank partially to remove and clean the vent valve. Keep in mind you are working on a gas system that is very dangerous. i.e. it doesn't like spark's. Only begin this job with a tank that is all but empty.
You can find diagrams of the vent system on the internet. So you can identify the parts I have referred to here.
I have done this work. It is not easy. It is an under the car and also through the car trunk operation. You will have to remove the gas pump via the trunk from the gas tank. Remember about the spark issue when you do this part of the job.
This problem is very common with Hyundai's and several other cars. It is because the manufacture has reduced the gas fill piping to roughly a 3/4" pipe and installed a government requied venting system that you have this problem. You will see that at the tank the opening is as fill lines used to be about 2" and at the gas nozzle area also about 2'" but the rest of the line is no larger in diameter than the gas pump nozzle. That is not to place the blame all on the car manufacture. You see it is always the government that is behind our frustrations in life. The EPA has told the car companies that the gas vapors we used to smell when the car was being fueled are no longer aloud. So the need for the charcoal vent system to capture the vapors of the gas as fueling is being done. Some car people have said that if you never overfill your tank these fueling problems never happen. i.e. the charcoal in the canister never gets wet with liquid gas only vapors. Note the warning stickers and owners manual cautions to stop the filling process when the gas nozzle clicks off the first time. Sally you will know if you have not followed this advise and fueled your car clicking the nozzle several times after the first nozzle stop. That is the way we used to fuel the cars in the good old days. However, I do almost all of the gassing of my car and I had the problem. So I say the car manufacture is responsible for the issue with poor designs in the system.
Lastly I can't stress enough the importance of not doing this job as a back yard mechanic operation because of the volatility of the gas. It can and will blow up if not handled correctly.
Good luck!!!!

EVAP System - Vent Valve

When filling your tank, if the fill hose kicks off and/or gas kicks back up the tube it's an indication that the evaporative emissions vent tube is plugged, the cannister vent valve is not working correctly, or that there is a restriction in the fill pipe/hose. Unless the tank or pipe was recently worked on or part of an accident, you can eliminate it. I've found several concerns involing the vent tube and cannister vent valve. Spiders like to make webs inside of these items and the web blocks the air from escaping. When you fill your tank, the air inside needs to go somewhere. If it can't escape, it will cause the gas to back up and shut off the fill handle or kick gas back. There are ways to check this function with a scan tool and pressure machine but you can also do a visual inspection by disconnecting the valve and looking for webs or debris. You can also run water though the open line or blow shop air though to be sure it's clear. Good luck, if you can't leave four thumbs up, please ask for more information. Have a great day!

I have 2002 Hyundai Accent. When fueling, I had to trickle the fuel in to prevent the fuel dispenser from constantly shutting off. Even then I could only get about a quarter gallon at a time between fuel shutoffs. Would take 10-15 minutes to put in 10 gallons. Very frustrating. I found and fixed the problem today. There is a charcoal cannister that is part of the Evaporative Emissions control system. It is located inside the rear fender well on the driver side, behind the driver side rear tire. You cant miss it. Actually looks like a square plastic box and it has hoses coming out of it. I removed the entire charcoal cannister assembly in about 15 minutes. Follow carefully. First, remove the electrical connector to the purge control valve (this valve assemby is mounted to the side of the charoal cannister on a bracket). No big deal. Then disconnect the three hoses that come out from the cannister assembly on the one side that faces the rear tire. Two of these hoses are small diameter about 1/4" and one is larger at about 5/8 inch diameter. Then you remove the 3 bolts that hold the whole cannister to the car frame. Then the whole piece comes out. Once I got the cannister and purge control valve out of the car as a whole assy I found the problem. The larger of the 3 hoses you disconnected as well as the port it connects to on the cannister was packed with the small charcoal pellets and actually formed a solid plug inside that larger hose. I had to stick a screw driver through that hose to knock the plug out that those charcoal pellets had formed. It all makes sense now. When you fill the tank with gas, you also push out air and vapor from the gas tank that is being displaced by the rising fuel in the tank. That vapor is supposed to go through that larger hose to the charcoal cannister where the fumes are removed by the charcoal. If that hose is plugged, like mine was, then the vapor has nowhere to go as you fill the tank and it increases pressure within the tank it causes the fuel dispenser nozzle to shutoff because it keeps detecting a pressure increase within the tank. That's my theory. I don't have the Hyundai design prints to confirm it. I had to tilt the charcoal dispenser so that the pellets came out of that larger hose port on the cannister. Like I said, even the port itself was full of pellets. So I poured out enough to clear the pellets that were in the hose port. I cleaned out the hose. Put everything back and went to go fill with gas. I filled that tank at full bore with no problem. Have the dealer or your mechanic check the ports and the hoses off the cannister. If they are filled with charcoal pellets, that is the problem. That should cost less than some of the fixes I have been reading about here.

check the filler neck. the hose may have a kink in it. also check the return line it may be pluged.

is this happening at the same pump??? Each pump has a tiny vacuum line that's located in the spout. When the gas reaches a certain level and starts to cause a vacuum, the pump shuts off

possible cause could be evap canister full of gas causing back up

have toyota or any machanic check the filer in the gas filler tube.

hi first of all i will address yours first as yours doesn,t have a engine check light on the return pipe on the petrol tank is blocked not allowing the tank to breath as your filling [causes are non return valve stuck closed trapped pipe or the pipes collasping . as for the guy with the engine light on you may well have the same problem but i would get the engine lights code checked as it could well be a problem with your emmissions venting your tanks fumes out yates210456