Fuel Tank Presurizing and wont take gas HELP!
01-19-2009, 08:22 AM
#1
Fuel Tank Presurizing and wont take gas HELP! this has been going on for a few years now. before if the tank got below 1/4 tank it would do this, now (after a walbro fuel pump install) it does it all the time. im sick of it and need some help bad. 
basically the fuel tank presurizes. you know the little silver flapper under the filler cap were you put the nozzle in, well there is another one down at the bottom of the filler neck where it meets the tank. (assuming)
so what happens is the fuel tank while driving presurizes and locks that flapper/valve shut locking the presure in the tank, and also not letting fuel into the tank(refueling). so when you go to put gas in the car it puts about a quart of fuel in the filler neck then starts spilling out onto the ground. so i take and hard tube or wire, and shuve it down the filler neck about 2 feet until it pops that lower valve well when it does it shoots gas and air out right at me at like 30 psi. and its not short its probly 2-3 seconds before it full releaves all the pressure. its a LOT of pressure. and of course covers me in gas, and well all know how impossible it is to get that smell off you.
this is VERY agrivating, for the first years i would always just fill up before it got to a 1/4 tank to avoid this. now with the new pump its all the time.
what is causing this and more importantly
HOW DO I FIX IT?!
basically the fuel tank presurizes. you know the little silver flapper under the filler cap were you put the nozzle in, well there is another one down at the bottom of the filler neck where it meets the tank. (assuming)
so what happens is the fuel tank while driving presurizes and locks that flapper/valve shut locking the presure in the tank, and also not letting fuel into the tank(refueling). so when you go to put gas in the car it puts about a quart of fuel in the filler neck then starts spilling out onto the ground. so i take and hard tube or wire, and shuve it down the filler neck about 2 feet until it pops that lower valve well when it does it shoots gas and air out right at me at like 30 psi. and its not short its probly 2-3 seconds before it full releaves all the pressure. its a LOT of pressure. and of course covers me in gas, and well all know how impossible it is to get that smell off you.
this is VERY agrivating, for the first years i would always just fill up before it got to a 1/4 tank to avoid this. now with the new pump its all the time.
what is causing this and more importantly
HOW DO I FIX IT?!
01-19-2009, 09:56 AM
#2
this has been going on for a few years now. before if the tank got below 1/4 tank it would do this, now (after a walbro fuel pump install) it does it all the time. im sick of it and need some help bad.
basically the fuel tank presurizes. you know the little silver flapper under the filler cap were you put the nozzle in, well there is another one down at the bottom of the filler neck where it meets the tank. (assuming)
so what happens is the fuel tank while driving presurizes and locks that flapper/valve shut locking the presure in the tank, and also not letting fuel into the tank(refueling). so when you go to put gas in the car it puts about a quart of fuel in the filler neck then starts spilling out onto the ground. so i take and hard tube or wire, and shuve it down the filler neck about 2 feet until it pops that lower valve well when it does it shoots gas and air out right at me at like 30 psi. and its not short its probly 2-3 seconds before it full releaves all the pressure. its a LOT of pressure. and of course covers me in gas, and well all know how impossible it is to get that smell off you.
this is VERY agrivating, for the first years i would always just fill up before it got to a 1/4 tank to avoid this. now with the new pump its all the time.
what is causing this and more importantly
HOW DO I FIX IT?!
basically the fuel tank presurizes. you know the little silver flapper under the filler cap were you put the nozzle in, well there is another one down at the bottom of the filler neck where it meets the tank. (assuming)
so what happens is the fuel tank while driving presurizes and locks that flapper/valve shut locking the presure in the tank, and also not letting fuel into the tank(refueling). so when you go to put gas in the car it puts about a quart of fuel in the filler neck then starts spilling out onto the ground. so i take and hard tube or wire, and shuve it down the filler neck about 2 feet until it pops that lower valve well when it does it shoots gas and air out right at me at like 30 psi. and its not short its probly 2-3 seconds before it full releaves all the pressure. its a LOT of pressure. and of course covers me in gas, and well all know how impossible it is to get that smell off you.
this is VERY agrivating, for the first years i would always just fill up before it got to a 1/4 tank to avoid this. now with the new pump its all the time.
what is causing this and more importantly
HOW DO I FIX IT?!
01-19-2009, 02:47 PM
#3
not familiar with evap stuff. i havent removed anything. outside the tank that is. they have you remove alot of stuff on the inside of the FP bucket inside of the tank for the walbro fuel pump.
where do you install the vent? where do i get one? do are tanks (99-02) have bladders? if so drilling the top of the tank wouldnt work.
where do you install the vent? where do i get one? do are tanks (99-02) have bladders? if so drilling the top of the tank wouldnt work.
01-27-2009, 11:36 PM
#7
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The rollover valve is causing you to not be able to put fuel in the tank. But it is not causing the tank to pressurize. As stated eariler you have a vent line collapsed or kinked somewhere.
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