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Trouble getting fuel in


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8 replies to this topic

#1 Glen9010

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Posted 27 September 2012 - 09:24 PM

2005 Legacy GT LImited - 58,000 miles



Left the car in the driveway while we were gone on a week vacation. Very hot here, over 100 every day. Came home and after a few days, had to fill up. Almost wouldn't take fuel. Kept clicking off and fuel would accumulate in the neck. I tried several other pumps at various stations with same result. Have to fill sloooooowwwwwly. Hard to tell when it is full as it clicks off constantly. Here is what I have checked.

Evap canister- removed and it appears perfect, no fuel and no clogs.
Filler neck- removed and checked. Appears fine.
All the lines I could get to seemed fine. As there are numerous ECU controlled valves, I assume it shouldn't be that as the ignition is off when filling up.

On a diagram, I found a vent valve that should open when tank pressure goes up when fueling. I am not sure if this is in the tank. If this is stuck closed, it could cause this problem. D

Does anyone have ideas and/or know where to find the vent valve? I'm afraid it is in the tank. The vent valve goes to the evap can.

I am looking for any thoughts.

#2 nipper

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Posted 27 September 2012 - 10:01 PM

That is your problem, the vent valve. Not sure if it is on the tank or under the hood. Also possible you have a clogged vent line.

#3 1 Lucky Texan

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Posted 27 September 2012 - 10:03 PM

could the car have been vandalized/damaged by someone trying to siphon fuel?

or maybe it's a spider infestation; http://content.usato.../1#.UGUS7FHUQ1I

#4 nipper

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Posted 27 September 2012 - 10:05 PM

http://opposedforces.com/parts is your freind

#5 somick

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Posted 28 September 2012 - 12:22 PM

This is an Endwrench article I have. I cannot attach pdfs. So here is a copy of the text:

Vehicle Won’t Take Fuel

Here are some tips to aid diagnosis if you encounter a Subaru that won’t
accept fuel through the filler neck or causes the gas nozzle to shut off
prematurely during refueling:
• Check the vehicle for
obvious problems first, such
as crushed or kinked hoses,
misrouted hoses or broken
components.
• If nothing abnormal is found,
attempt to refuel the vehicle
to confirm the customer’s
complaint.
• While at the pump, remove
the Fuel Tank hose from
the canister. Remember, there
are three hoses at
the canister: one for Purge
(usually the smallest in
diameter), one for the Fuel
Tank and one for the Drain to
atmosphere after passing
through the charcoal canister.
• If the vehicle will refuel
normally after removing the
canister Fuel Tank hose, the
problem is most likely between the canister and the vent hose in the
rear frame rail.
• If the vehicle still won’t refuel after removing the canister Fuel Tank
hose, the problem is most likely between that hose and the tank.
• Gain access to the pressure control solenoid valve hose connections to
further isolate the problem.
Hose obstructions that appear as small as spider webs can cause refueling
problems. Clearing out the debris should correct the problem.

I hope this helps.

Sam

#6 Glen9010

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Posted 29 September 2012 - 04:33 PM

So far, all lines appear to be clear. Have an ugly feeling the vent valve is in the tank. Haven't seen it on any exploded views of the tank area. A mechanic friend checked for any TSB or recall and nothing. He checked everything he could and didn't see anything out of the ordinary. Has never thrown a CEL. Doesn't look like any system that is ECU controlled. Solenoid valves, purge, etc. Anyone know for sure where the vent valve is located? Have read that it is spring loaded and opens when pressure in the tank, such as when filling, goes up, the pressure overcomes the spring pressure and lets air/fumes vent to the evap can. Any way to pressurize the tank to force the vent valve open?

#7 1 Lucky Texan

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Posted 29 September 2012 - 08:57 PM

So far, all lines appear to be clear. Have an ugly feeling the vent valve is in the tank. Haven't seen it on any exploded views of the tank area. A mechanic friend checked for any TSB or recall and nothing. He checked everything he could and didn't see anything out of the ordinary. Has never thrown a CEL. Doesn't look like any system that is ECU controlled. Solenoid valves, purge, etc. Anyone know for sure where the vent valve is located? Have read that it is spring loaded and opens when pressure in the tank, such as when filling, goes up, the pressure overcomes the spring pressure and lets air/fumes vent to the evap can. Any way to pressurize the tank to force the vent valve open?


I THINK it's on top of the tank. but it may vary with years/models. maybe dig around at opposedforces.com

also, maybe some SeaFoam in a tankful of fuel would loosen a stuck valve?

#8 Glen9010

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Posted 29 September 2012 - 09:08 PM

Lucky
I think it is on top also. That poses an ugly situation. Can't just drop the tank and have a look. Just filled up and still slow. I could hear it vent back through the filler neck. Have to go so slow. Hard to get it completely full as the higher the level, the quicker the nozzle shuts off. Fuel just backs up in the neck. Has to be the vent. Is this valve replaceable or does this entail a tank replacement? YUCK! :banghead:

#9 Captain_depakote

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Posted 05 December 2013 - 04:07 AM

my 2008 wrx started having this problem about a week ago, it did it for a second time tuesday night and left me stuck 45 mins to an hour from the house. I ended up having to call my family, and we where able to stick a coat hanger down the filler neck, and got 2-3 gallons end, I'm going to have to try the recommend stuff. thanks, also any one know how much the purge vavle will cost. sorry to high jack I'm a newbie.






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