Fuel Leak

Pete_89T2 · 04-14-2011, 07:09 AM

Answers:

1. Both of those lines with the worm gear clamps are fuel. One of them (forget which - consult FSM or just follow the hose to figure it out) connects to the outlet of the fuel filter, and sees high pressure from the pump. The other is the return fuel line back to the tank. Get rid of those crappy worm gear clamps ASAP and get the proper clamps for fuel injection plumbing - the spring OEM type or the T-bolt style band clamps that are rated for this. Ditto for the hose - you'll also want to check the hose to verify that it is rated for high pressure fuel injection systems, not the cheaper fuel line hose that you can use on carb cars.

2. No, but that 3rd open nipple is for fuel vapors. Per the FSM, for a S5 turbo this one routes back to the charcoal canister.

3. I really can't tell from the picture, but on my S5 T2, that 3rd open nipple (discussed in #2 above) connects to a hose, which routes to another hardline nipple on the firewall, and that hardline routes across the FW to near the charcoal canister, where it connects to the canister with another hose.

4. Nope, just fuel vapors.

5. There are 2 nipples on the canister - you'll need to consult the FSM to determine which one goes where, but one of the nipples on the canister goes as discussed in #2 & 3, the other line goes back to the fuel tank, via hose & hard line.

04-14-2011, 07:09 AM	#5
Pete_89T2 Lifetime Rotorhead Join Date: Apr 2010 Location: Elkton, MD Posts: 874 Rep Power: 16	Answers: 1. Both of those lines with the worm gear clamps are fuel. One of them (forget which - consult FSM or just follow the hose to figure it out) connects to the outlet of the fuel filter, and sees high pressure from the pump. The other is the return fuel line back to the tank. Get rid of those crappy worm gear clamps ASAP and get the proper clamps for fuel injection plumbing - the spring OEM type or the T-bolt style band clamps that are rated for this. Ditto for the hose - you'll also want to check the hose to verify that it is rated for high pressure fuel injection systems, not the cheaper fuel line hose that you can use on carb cars. 2. No, but that 3rd open nipple is for fuel vapors. Per the FSM, for a S5 turbo this one routes back to the charcoal canister. 3. I really can't tell from the picture, but on my S5 T2, that 3rd open nipple (discussed in #2 above) connects to a hose, which routes to another hardline nipple on the firewall, and that hardline routes across the FW to near the charcoal canister, where it connects to the canister with another hose. 4. Nope, just fuel vapors. 5. There are 2 nipples on the canister - you'll need to consult the FSM to determine which one goes where, but one of the nipples on the canister goes as discussed in #2 & 3, the other line goes back to the fuel tank, via hose & hard line.