if u don't want to hold it upside down, you can also pull on the rubber thing upwards like how you fill up a gas can after it starts to click off. thats what i do.

 

So funny, in NJ you can't pump your own gas. At the gas station that I normally go to only one of the pumps fills up the tank to the Max, if that pump is taken I end up with 3/4 tank...let's see their reaction when I tell them to place it upside down.

 

anyone overfill a tank with the nozzle upside down or does it still click off at full?

 

Darn, just spent a ton on my 2004 C4S trying to fix this. Had them do the TSB (on my dime) which loosened the hoses in the gas tank and removed the flap at the bottom on the fill up pipe. Then had to replace the charcoal filter can because I overfilled trying to get the gas in and filled it up with gas. After all this it did no good, still only fills to 3/4. Will try the upside down method and kick myself each time for spending so much without any result.

 

Upside down is the way to go, it still clicks when full as expected...

 

I filled up mine last night with close to 17 gal and I just got less than half on the gauge that went up slowly to half. First time it happened as I always fill up only at 2 stations and previously they were always at full.

 

I have 99 with same problem, only owned it for the past 1.5 months. I had some luck with upside down pump (intermittent though) no guarantees and does not always work. Usually I fill up when the light comes on and ends up putting in about 13.5 gallons after 250 miles or so. Does this sound right to others? I think I can live with gauge reading almost full...

 

This won't come as new information to most, but also trying filling up in the morning and evening when temperatures are colder. Fuel in the tank, and the gas station is condensed, so you are making sure you are getting bang for your buck.

 

I had the same problem, but I started using the upside down method and it went away. I have to say that this was the most annoying problem I've had on a car. I'm one of those guys that likes to have a full tank all the time.

 

I followed the advice of running the tank all the way to empty a few times and the gauge goes to full every time now

 

You would get the same amount of additional gas by finding the lowest elevation gas station in you town.....meaning you ain't getting a measurable difference between 7am filling versus 2pm filling. The gas is in the ground where fluctuations in temperatures are minimal.


However I do have the answer about the not filling up.....

The first cars off the line of Porsches were to be sent to Australia and the tanks were magnetically charged to accommodate the southern hemisphere. But this was right before the 1998 Australian Water Front Dispute...

1998_Australian_waterfront_dispute

In turn the cars were then shipped to the US without changing out the SHPFT's (Southern Hemisphere Polarized Fuel Tanks) Part number 996-01-1AUS

So the only way you can fill the tank is by, well, turning the pump handle upside down.....

Look it up.....

 

Simply Brilliant! I love it man!

 

I find this so annoying, I've had 2 MK1 996's, and both had the same issue...

 

Oh what a wonderful feeling!!! After spending a ton of money and all kinds of time trying to fix it, I just turned the nozzle upside down and it filled up with no problem. It is such a pleasure seeing the needle on full. Everyone, thank you for the advice - It works!!!

 

thanks for the tip