How does this work?

[shastamonk]

I have a gas leak on the front of my car. After I descovered a gas puddle on top of my gas sending unit I replaced it with a new one (OEM). It worked for a few months and now the new one leaks or at least it has another gas puddle on top of it. When I disconect the line on the right it has pressure in it. Is that normal? It this line suppose to relieve the pressure? And if thats the case I would guess this is what caused the sending units to crack. What does this line do? When I sisconect it gas pukes out for a bit and I hear a pressure hiss out. HELP!!!!

Regards,

Scott

[wvicary]

Inspect the O-ring seals in the fuel line coupler.

[shastamonk]

Is that the line on the right or the left? Are you refering to the Orings right at the top of the sending unit where the two lines connect? Should there be pressure in the line on the right? I can see cracks that go strait through the top of the sending unit to the inside of the tank.

Scott

[N41EF]

In that picture, the line on the left is the outlet, thar one on the right is a vent and should not be pressurized. The Bemtly's isn't clear, but I would assume it goes to the evap canister for emmissions control. That line looks to be used for checking the fuel tank pressure or checking for leaks. The evap canister is in the right front wheel well behind the plastic cover behind the tire. It would be worth pilling the whell and line to see if a hose is crimped, or something is amiss that would let pressure build up.. The canister is suppossed to vent the tank and capture vapors so they can get purged into the intake and burned. Something in your system isn't working right, you might also check for codes with an OBD reader, it's possible to have codes with no CEL.

[tholyoak]

Sorry but you have it backwards. In the photo the line on the right is the fuel pump output to the engine. This car has a returnless system, so no return line from the fuel rails. The line on the left, on top of the round disc looking thing, is the tank pressure release valve. On the underside is a small opening that when the tank pressure builds it raises a disc and vents pressure through this line to the EVAP system.

-Todd

In that picture, the line on the left is the outlet, thar one on the right is a vent and should not be pressurized. The Bemtly's isn't clear, but I would assume it goes to the evap canister for emmissions control. That line looks to be used for checking the fuel tank pressure or checking for leaks. The evap canister is in the right front wheel well behind the plastic cover behind the tire. It would be worth pilling the whell and line to see if a hose is crimped, or something is amiss that would let pressure build up.. The canister is suppossed to vent the tank and capture vapors so they can get purged into the intake and burned. Something in your system isn't working right, you might also check for codes with an OBD reader, it's possible to have codes with no CEL.

[shastamonk]

Thanks for the input everyone! I really am greatful! I'll check into it see what I find.

Quick question, should there be pressure on the line on the right? I assume so, if this is the supply to the intake.

Regards,

Scott