Fuel filling problem on mustang GT '00

EnkeiWheels · Aug 18, 2010

Hi, I'm new here and yesterday I bought a 2000 automatic mustang GT.

Everything is fine except that when I want to fill it with fuel at the gas station, it always shuts off. Even if I try not to enter the whole thing in the filling tube and not pull hard on the trigger, it shuts off after 1 to 5 seconds.

I think it may be a venting problem or something ? What should I do ?

Thanks a lot

PS Don't hesitate to ask questions if you don't understand my english.

wmburns · Aug 18, 2010

Congrats on the new addition.

I have nearly the same problem. I am 98% sure that my problem is a clogged charcoal canister. The part isn't too expensive and it is fairly easy to change.

Recommend that you start by seeing if you can blow through the charcoal canister. It is located behind the left rear wheel near the gas tank.

Replace the charcoal canister if you can not blow through the old one.

If you want a work around check out my thread.

http://www.stangnet.com/mustang-forums/801796-slow-re-fueling-2000-gt.html

EnkeiWheels · Aug 18, 2010

Thanks a lot I'll read all of this

EnkeiWheels · Aug 19, 2010

I'll look at the fuel venting lines and the charcoal canister this week end. Updaqte to come.

Thanks again

EnkeiWheels · Aug 21, 2010

@wmburns : in wich picture of this thread ( Troublcodes.net Trouble Codes OBD & OBD2 Trouble Codes and Technical info & Tool Store. By BAT Auto Technical ) can we see the line that has to be drilled a bit ?

Thanks

wmburns · Aug 21, 2010

EnkeiWheels said:
@wmburns : in wich picture of this thread ( Troublcodes.net Trouble Codes OBD & OBD2 Trouble Codes and Technical info & Tool Store. By BAT Auto Technical ) can we see the line that has to be drilled a bit ?

Thanks

Technically NONE. The car shown is a 2002. The tank vent was re-designed in 2001.

But in picture #9 top is where the vent attaches. Note, in the 1999-2000 MY, the vent goes DIRECTLY to the tank. There is a dedicated vent line just for this.

Note, in my case drilling out the restrictor did not FIX the problem. It did make it better. Also note, this does somewhat defeat the design of the tank. The restrictor is in place to limit the amout of fuel that could leak during a rollover and to force the vapors through the charcoal canister.

EnkeiWheels · Aug 21, 2010

Okay. I went back to the station this afternoon and tried to fill it with engine turned on. I was surprised to see that it worked fine. But it is not very safe..

wmburns · Aug 21, 2010

Engine running has nothing to do with it. The CV vent solenoid default position is "open". It takes power to close it. The only time it closes is when the PCM is running an EVAP leak test.

The outside temperature probably have more effect on just how much venting the tank needs. Differences in gas stations filling nozzles also come into play.

Finally, let me give you some good reasons to NEVER fill up while the engine is running.

You have already mentioned that it is unsafe. It is also against the law.

If an EVAP purge were happen to occur while re-fueling with the engine running, then raw gas would be drawn into the charcoal canister when the tank filled up. This WILL ruin the charcoal canister. Further, there is a high likely hood that raw gas will be drawn through the charcoal canister and into the engine. If enough gas is drawn in, engine hydro lock is a possibility. Another possibility is an intake manifold back fire.

The charcoal canister new from Ford is only $80. The part is super easy to change. The area can be a little dirty, but nothing more than simple hand tools are needed. Remove the left rear tire to improve access.

Good luck. Hopefully we won't be reading about you on the evening news.

sbelyo · Aug 23, 2010

By any chance is there a small puddle of gas near the rear tire after you try and fill it up?

kyle_99gt · Aug 24, 2010

mine does that aswell i just got to change the angle of the spout when i put it in and it works fine.

wmburns · Aug 24, 2010

sbelyo said:
By any chance is there a small puddle of gas near the rear tire after you try and fill it up?

A leaky tank grommet (donut) is a common problem esp on older Mustangs. IMO, it is not the OP's issue. If it were, then the tank would vent through the grommet leak and pre-mature shutoff would not be an issue.

Regarding changing the angle of the gas nozzle. That work from me sometimes. However, it did have one down side. It was far more likely to spray gas out the filler neck. So be careful standing in way.

I think there are varying degrees of clogging as the charcoal canister ages. In my case, even very high pressure air could not be forced through the canister. I believe this was from a two year period that my car was in-op with a full tank of gas.

So depending upon just how bad your charcoal canister is clogged will depend upon how well the various work arounds perform for you.

EnkeiWheels · Aug 24, 2010

Can this affect the mpg ?

wmburns · Aug 24, 2010

Leaking grommet - yes. Obviously gas leaking on the ground will lower MPG's. Also, the leak may cause a DTC during EVAP leak test.

Slow re-fueling - Other than a PIA to re-fill there are no issues. For the style EVAP system used in the 1999-2000 a clogged charcoal canister is unlikely to cause a DTC.

For other EVAP systems a clogged charcoal caniser may cause a DTC.

EnkeiWheels · Aug 24, 2010

I meant if my charcoal canister is ruined.

What is a DTC ?

Thanks a lot

wmburns · Aug 24, 2010

EnkeiWheels said:
I meant if my charcoal canister is ruined.

No impact on MPG's.

EnkeiWheels said:
What is a DTC ?

Diagnostic Trouble Code. AKA check engine light. MIL.

EnkeiWheels · Aug 25, 2010

Okay thanks So this has no effect on the car except for pissing off at fuel filling

Fuel filling problem on mustang GT '00

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