94Z28LS1toLT1

hey can anybody provide me with a diagram of the fuel tank assembly i have a gas leak thats pouring out of the fuel tank vent valve after driving for 20 minutes. i would like to know where the lines exactly go because the mechanic that worked on my fuel pump isnt cooperating with me in this leak. so id like to take the matters into my own hands. thank u eveybody

RamAir95TA

There are four lines that come out of the fuel tank.

Two go to the fuel rail (feed and return).
One is the fuel tank vent valve (with the white valve you mention).
The last one goes to the charcoal canister in the driver side quarter panel.

94Z28LS1toLT1

i dont know what to say thank u alot man i needed that

94Z28LS1toLT1

for sure cool hey how do i know what line for the fuel tank vent valve goe because after a certain of time of driving the pressure builts up in the tank and then fuel will leak thru the vent valve (white valve)and like u said and fred said that if fuel comes thru there the line is in the wrong place

Injuneer

Its my GUESS that you may have the hoses connected incorrectly. There's no way anyone can say that with certainty.

Shoebox has a crude drawing of the lines from the shop manual, but it doesn't show it very clearly:

http://shbox.com/1/evap_system.jpg

RamAir95TA

The two lines with the white quick-disconnects are the feed and return, the other two with the standard slip-fit (no clamps) are for the canister and vent.

94Z28LS1toLT1

hey Fred and RamAir95TA when i was underneath the car with a flashlight looking at the fuel lines to check the connections for the leak, i see a black hose right along the fuel tank at the end of the hose theres a hole could that be where my leak is coming from,i checke the hose, and its coming from the charcoal canistor, but i don't know where that hose goes it was dark outside so i just left it.

94Z28LS1toLT1

Ttt

94Z28LS1toLT1

I got it guys i fixed the issue one of my fuel hoses thats connects to a piece that has a bracket on the throttle on the passenger side of the engine was out. i put a small clamp on it so it wouldnt fall off, by that hose being out my fuel tank was building so much pressure and gas was leaking thru the fuel tank vent valve.

THANK U TO EVERYBODY who partcipated in Mike's car issue

Injuneer

You completely lost me.... there is no "bracket on the throttle on the passenger side of the engine". No idea what you mean.

94Z28LS1toLT1

i didnt mean for u to get lost Fred i mean the evap purge solenoid there is a bracket on it, one of the lines that runs along to the fuel lines was out of the solenoid causing a lot of pressure to build in the tank. oops im sorry i dont know why i put throttle im sorry dude