jlbell

I said a plethora, and I only needed to take 2. Oops. Here they are:




It would appear that you car is different then mine, unless whenever whoever changed the engine they completely forgot to put back the blue hose. This just adds to the mystery. I think it might be in your best interest to find out what fuel injection system you have, and/or bring it to someone who has experience with these cars.

aTOMic

Danm, I thought you meant the little, hard line at the left! The big line, I dunno!? Where does the other end go?

Haha good advice!

That reminds me, what is the engine code of your car?? It's stamped on the front top surface of the right head IIRC. Mine is BFM as are all 2004s in US but they could've replaced it with a newer one (although it appears you have the "old style" PCV/crankcase vent valve so = 2004=BFM); let us know which engine they put into your car please.

Jakecostello

I'm not really sure where I should be looking? I see a spot that looks like a lift point, but the top surface of that is smooth

Jakecostello

Okay so from google searching, I think you may have cracked the case here on what prompted the problem. My car is a 2006 which from pictures online appears to not have a fuel supply return line? But this engine may be the 2004 style as you mentioned, which does have a return line. So I suppose I could try to find a 2006 style fuel rail, or I could try to figure out a place for excess fuel to return to the tank

Jakecostello

Apparently my fuel filter has a built in pressure regulator. I think I can probably block the return fuel line off and maybe I'll be good. I hate that this car has been messed with and isn't straight forward

aTOMic

My mistake; that's on my 1.8T. There are the smooth spots corresponding on the 4.2 but below is from Bentley. Just hope your engine matches the code from the vehicle data plate (located near the spare tire and in owner's manual; take a pic of it you may need it in the future). 2006s had either BFM or BGK engines.

That would suck.

Never heard of that, but I don't know everything.

jlbell

The engine code is just the code for the engine. The fuel/intake system has another code to my knowledge. Also if you want to find the code easier just look in the wheel well in the trunk. The sticker will be placed on the box where the jack is placed. I just uploaded another file to the dropbox where it mentions that some BFM engines and MPI fuel system can not have a fuel return line. Weird! I am going to check one more source and upload that to the dropbox as well. Ok I uploaded a file that will finally answer if you should or should not have a fuel return line. Pull the luggage compartment lining out and follow the PDF labeled Checking For Fuel Return Line. If you car is designed for a fuel return line then you will have three ports going to the right side pump cap thing, it is described better and clearly laid out in the pdf that is uploaded. Hopefully this will end the mystery! Also upload pictures of what you find in the trunk, I am curious to see what is there, since I am to lazy and have no need to do it myself.

aTOMic

Some cars have no box, there's always a sticker on the right sheetmetal of the car, near the spare. The box is also near the spare. Easiest is owner's manual, if you have the one from the cat (matching VINs).

BGKs have no FPR.

aTOMic

PS You're right; there IS a fuel filter with internal regulator for cars with no return line!

Jakecostello

Ya that's a pretty sweet design. I capped the return line, haven't driven the car yet but hopefully it'll run fine like that. It seems that I am slowly working all the bugs out of the car. I wish there was one local I could look at for reference. Seems that the A8 is relatively rare