Sab

You're right heinrich, I shouldn't drive it anymore until it's fixed. Just too bad that I have the GT pulled apart as well...
I tried to locate it yesterday but can't figure out excatly where it's coming from. It is intermittent and seems to come from the rear. How can I check what exactly could be causing it? Can I somehow pressurize the tank and listen for the leak?

heinrich

Sab I'd say it's far more likely that it's coming from the front. Check that engine bay really carefully, sometimes the fuel dampers like to sweat, and those little silly loop-de-loop fuel hoses all over the front, side and rear of the engine like to crack and cause engine fires. Check them out first. Make sure the engine bay isn't the source. After that, travel to the rear of the car. Spend a lot of time at the passenger's rear quarter, I'd even pull the roadwheel there and (making sure it's nice and safe) sit in the wheel well and have a beer, sniffing around. What did you find under the cover on the shelf, not a whiff?

heinrich

Sab it would be nice to have you around a bit longer

Sab

This sounds like it'll be a real project. And I am just about to sell the car, hopefully the buyer will understand that this is probably a small fix.

Abby Normal

I'm telling you, it's the sending unit o-ring. You are describing a problem I fixed last week.

Randy V

So does the S4 have a fuel accumulator?

Sab

Hi Abby,
I guess I will order the o-ring, since I can't see anything else leaking.
So just disconnect the hose coming out of the cap, remove cap, replace o-ring and that's it?
That would be the easiest fix yet...
regards,
Sab.

Abby Normal

Thats pretty much it. Also clean out the basket filter in the unit. I drove my car a long distance today, with a full tank when I left, and never once smelled fuel. Like you, mine was so bad I was scared to drive the car until I fixed it. The last thing I wanted was to have my car burn up. By your description, it's exactly like mine was doing so hopefully that's your fix. Good luck!

cambria

From my expierence, all rubber fuel lines are suspect on 15+ year old Porsche's. I recently read a post on a engine fire where the front fuel rail hose leaked and caught fire. I looked mine and noticed that the rubber hose had srunk and a gap existed between the compresion collar and the hose. The rear hose is simular to the front. I will replace both. On the 944 cars thier is a simular hose between the fuel pump and the hard line to the engine and mine sarted leaking and needed to be replaced. Should you smell fuel I would check the fuel lines from front to rear and also check the fuel injector seals.