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  #1  
Old 04-25-2012, 03:44 PM
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does anyone else have an issue with the nozzle not clicking off at the pump and sloshing fuel all over the bedside and onto the ground. probably a wasted .25 gallons every fillup unless i watch the gauge. i'm not one of these people that puts $10 in at a time...when i'm there i fill up....wonder if it's the gas station of the truck...guess i'll have to try another station, i just have been clicking it off once it says full but every once in a while it still gets me!
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Old 04-25-2012, 08:22 PM
Kruzer Kruzer is offline
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If the pump is not shutting off then it is the gas pump at fault, but if the pump is shutting off but gas spills out after it shuts off then your truck has a problem. When the later happens it means you have a vent malfunction with the gas tank. Since the vent is blocked in some way the gas has no other place to go but back out the fill tube.
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Old 04-26-2012, 10:00 AM
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so my pristine truck with 30K miles somehow has a blockage in the vent tube between the tank and the filler neck?..... i did get a gas cap message around 2 months ago, but i got out, tightened it, and havent seen it since, wonder if it's a vapor lock issue or something with that vent line.
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Old 04-26-2012, 11:02 AM
Warlock III Warlock III is offline
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No no no... (it's not "blockage" per se) There's a green plastic ball at the bottom of the inlet, a check valve if you will. It's there to keep the fuel from spilling out in the event of a roll over (and helps to keep people from siphoning your gas).

What you may be experiencing is that valve working properly and a faulty pump handle at the station.

When the tank is full the ball seats in the opening of the tank due to the fuel level rising and effectively closes off the tank. The pump handle is intended to identify the pressure change and shut the pump off.

Now if it were an older vehicle I'd suggest that the older flap valve (predecessor to the check ball) may have a faulty spring.

Try a different pump. If in fact it does continue to happen...well then the check ball may be defective and possibly filled with fuel making it heavy and causing it to malfunction by not closing the tank off properly.

Last edited by Warlock III; 04-26-2012 at 11:05 AM.
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Old 04-26-2012, 03:36 PM
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that makes better sense, thanks. i'll try topping off at another station this weekend!...mabe that check ball is stuck if it keeps doing it.
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Old 04-26-2012, 04:19 PM
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My truck did this since I purchased it new. The Dealer ended up replacing the tank as there was a problem with the venting system on the tank, Dodge advised them of this. Haven't had a problem since they put the new tank in.
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Old 04-26-2012, 08:15 PM
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Quote:
Originally Posted by rdsabin View Post
My truck did this since I purchased it new. The Dealer ended up replacing the tank as there was a problem with the venting system on the tank, Dodge advised them of this. Haven't had a problem since they put the new tank in.
This is the exact problem I was talking about. The rollover valve only comes into play if the vehicle is turned over. This valve is actually made into the tank itself and looks like a small gage with the ball inside, and gravity is what makes it work. While normally upright it doesn't really do anything (it does prevent fuel theft by siphoning as stated by Warlock III), fuel can easily flow right into the tank while you are gassing up. When the vehicile lands on the shiny side (upside down or enough angle to move the ball) the ball rolls to the normally open inlet and closes it off to negate a fuel spill.

Basically if you were to blow into a coke bottle as hard as you can, once you let up the air will be forced back out the same hole it came in. The vent allows the pressure to be released in the tank without it coming back out of the filler neck. So if fuel is coming out of your filler neck you do have a blockage in the vent system, which may mean a replacment of the fuel tank, a defective component or even a pinched hose.
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Old 04-26-2012, 08:46 PM
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Well then, taking the recent information into consideration. I must have been completely wrong and there is no ball that also acts as a rollover valve. There is apparently nothing to keep the fuel in the tank in the event of a roll over. However, there are two small vents that signal the rollover, and shut off the fuel pump circuit. Those are apparently the only problems that could cause your symptoms.

I apologize if I inadvertently misinformed you.

Last edited by Warlock III; 04-26-2012 at 09:35 PM.
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Old 04-26-2012, 10:32 PM
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Quote:
Originally Posted by johnnymac2k6 View Post
so my pristine truck with 30K miles somehow has a blockage in the vent tube between the tank and the filler neck?..... i did get a gas cap message around 2 months ago, but i got out, tightened it, and havent seen it since, wonder if it's a vapor lock issue or something with that vent line.
Yes it is your truck. Mine did the same thing when it had 26k on it. The dealer replaced the tank after a few small failed tries and I have not had an issue. It someone that happened at the factory. It is fairly common, I posted sotmg at it two years ago and got a lot of feedback from other guys saying that they had the same problem.

Quote:
Originally Posted by rdsabin View Post
My truck did this since I purchased it new. The Dealer ended up replacing the tank as there was a problem with the venting system on the tank, Dodge advised them of this. Haven't had a problem since they put the new tank in.
Yup! No problem after the tank was replaced!
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Old 04-26-2012, 11:50 PM
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Warlock III, it's all good, and I hope I did not make it sound like I was trying upstage you in anyway. I just know from experience that if the tanks vent system is jacked up you will get the fuel burp as described. So, if I did, then I appoligize as well. Cheers to you...
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