Mystery valve help needed
02-13-2005, 01:43 PM
#1
Guest
Posts: n/a
Mystery valve help needed
My son's recently acquired '90 YJ (4 cylinder, 5-speed) has been
smelling of gasoline, and a little checking revealed a broken valve
tucked up inside the body behind the right rear wheel well. I have a
factory service manual and have studied it carefully but can't figure
out the purpose of this valve. It looks to be a check valve, on one
side there's a line going to the fuel tank and on the other side
there's a vacuum hose that runs up to the engine compartment. I
thought mabe it was a rollover valve but according to the manual those
are supposed to be attached the fuel tank.
What do I ask for when I go to the dealer to get a replacement?
smelling of gasoline, and a little checking revealed a broken valve
tucked up inside the body behind the right rear wheel well. I have a
factory service manual and have studied it carefully but can't figure
out the purpose of this valve. It looks to be a check valve, on one
side there's a line going to the fuel tank and on the other side
there's a vacuum hose that runs up to the engine compartment. I
thought mabe it was a rollover valve but according to the manual those
are supposed to be attached the fuel tank.
What do I ask for when I go to the dealer to get a replacement?
02-13-2005, 04:24 PM
#2
Guest
Posts: n/a
Re: Mystery valve help needed
Miguel did pass the time by typing:
> My son's recently acquired '90 YJ (4 cylinder, 5-speed) has been
> smelling of gasoline, and a little checking revealed a broken valve
> tucked up inside the body behind the right rear wheel well. I have a
> factory service manual and have studied it carefully but can't figure
> out the purpose of this valve. It looks to be a check valve, on one
> side there's a line going to the fuel tank and on the other side
> there's a vacuum hose that runs up to the engine compartment. I
> thought mabe it was a rollover valve but according to the manual those
> are supposed to be attached the fuel tank.
>
> What do I ask for when I go to the dealer to get a replacement?
From what you describe that sounds like the line that vents the fuel
tank to the charcoal canister up front. It's a check valve that allows
fuel vapor to run up and get trapped in the canister. The vapors are
then sucked back into the intake when the engine starts.
Part of the emissions control stuff.
--
DougW
> My son's recently acquired '90 YJ (4 cylinder, 5-speed) has been
> smelling of gasoline, and a little checking revealed a broken valve
> tucked up inside the body behind the right rear wheel well. I have a
> factory service manual and have studied it carefully but can't figure
> out the purpose of this valve. It looks to be a check valve, on one
> side there's a line going to the fuel tank and on the other side
> there's a vacuum hose that runs up to the engine compartment. I
> thought mabe it was a rollover valve but according to the manual those
> are supposed to be attached the fuel tank.
>
> What do I ask for when I go to the dealer to get a replacement?
From what you describe that sounds like the line that vents the fuel
tank to the charcoal canister up front. It's a check valve that allows
fuel vapor to run up and get trapped in the canister. The vapors are
then sucked back into the intake when the engine starts.
Part of the emissions control stuff.
--
DougW
02-13-2005, 04:24 PM
#3
Guest
Posts: n/a
Re: Mystery valve help needed
Miguel did pass the time by typing:
> My son's recently acquired '90 YJ (4 cylinder, 5-speed) has been
> smelling of gasoline, and a little checking revealed a broken valve
> tucked up inside the body behind the right rear wheel well. I have a
> factory service manual and have studied it carefully but can't figure
> out the purpose of this valve. It looks to be a check valve, on one
> side there's a line going to the fuel tank and on the other side
> there's a vacuum hose that runs up to the engine compartment. I
> thought mabe it was a rollover valve but according to the manual those
> are supposed to be attached the fuel tank.
>
> What do I ask for when I go to the dealer to get a replacement?
From what you describe that sounds like the line that vents the fuel
tank to the charcoal canister up front. It's a check valve that allows
fuel vapor to run up and get trapped in the canister. The vapors are
then sucked back into the intake when the engine starts.
Part of the emissions control stuff.
--
DougW
> My son's recently acquired '90 YJ (4 cylinder, 5-speed) has been
> smelling of gasoline, and a little checking revealed a broken valve
> tucked up inside the body behind the right rear wheel well. I have a
> factory service manual and have studied it carefully but can't figure
> out the purpose of this valve. It looks to be a check valve, on one
> side there's a line going to the fuel tank and on the other side
> there's a vacuum hose that runs up to the engine compartment. I
> thought mabe it was a rollover valve but according to the manual those
> are supposed to be attached the fuel tank.
>
> What do I ask for when I go to the dealer to get a replacement?
From what you describe that sounds like the line that vents the fuel
tank to the charcoal canister up front. It's a check valve that allows
fuel vapor to run up and get trapped in the canister. The vapors are
then sucked back into the intake when the engine starts.
Part of the emissions control stuff.
--
DougW
02-13-2005, 04:24 PM
#4
Guest
Posts: n/a
Re: Mystery valve help needed
Miguel did pass the time by typing:
> My son's recently acquired '90 YJ (4 cylinder, 5-speed) has been
> smelling of gasoline, and a little checking revealed a broken valve
> tucked up inside the body behind the right rear wheel well. I have a
> factory service manual and have studied it carefully but can't figure
> out the purpose of this valve. It looks to be a check valve, on one
> side there's a line going to the fuel tank and on the other side
> there's a vacuum hose that runs up to the engine compartment. I
> thought mabe it was a rollover valve but according to the manual those
> are supposed to be attached the fuel tank.
>
> What do I ask for when I go to the dealer to get a replacement?
From what you describe that sounds like the line that vents the fuel
tank to the charcoal canister up front. It's a check valve that allows
fuel vapor to run up and get trapped in the canister. The vapors are
then sucked back into the intake when the engine starts.
Part of the emissions control stuff.
--
DougW
> My son's recently acquired '90 YJ (4 cylinder, 5-speed) has been
> smelling of gasoline, and a little checking revealed a broken valve
> tucked up inside the body behind the right rear wheel well. I have a
> factory service manual and have studied it carefully but can't figure
> out the purpose of this valve. It looks to be a check valve, on one
> side there's a line going to the fuel tank and on the other side
> there's a vacuum hose that runs up to the engine compartment. I
> thought mabe it was a rollover valve but according to the manual those
> are supposed to be attached the fuel tank.
>
> What do I ask for when I go to the dealer to get a replacement?
From what you describe that sounds like the line that vents the fuel
tank to the charcoal canister up front. It's a check valve that allows
fuel vapor to run up and get trapped in the canister. The vapors are
then sucked back into the intake when the engine starts.
Part of the emissions control stuff.
--
DougW
02-13-2005, 05:26 PM
#5
Guest
Posts: n/a
Re: Mystery valve help needed
Could be your gas tank roll-over check valve. Some attached to the
frame cross member just forward of the tank.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Miguel wrote:
>
> My son's recently acquired '90 YJ (4 cylinder, 5-speed) has been
> smelling of gasoline, and a little checking revealed a broken valve
> tucked up inside the body behind the right rear wheel well. I have a
> factory service manual and have studied it carefully but can't figure
> out the purpose of this valve. It looks to be a check valve, on one
> side there's a line going to the fuel tank and on the other side
> there's a vacuum hose that runs up to the engine compartment. I
> thought mabe it was a rollover valve but according to the manual those
> are supposed to be attached the fuel tank.
>
> What do I ask for when I go to the dealer to get a replacement?
frame cross member just forward of the tank.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Miguel wrote:
>
> My son's recently acquired '90 YJ (4 cylinder, 5-speed) has been
> smelling of gasoline, and a little checking revealed a broken valve
> tucked up inside the body behind the right rear wheel well. I have a
> factory service manual and have studied it carefully but can't figure
> out the purpose of this valve. It looks to be a check valve, on one
> side there's a line going to the fuel tank and on the other side
> there's a vacuum hose that runs up to the engine compartment. I
> thought mabe it was a rollover valve but according to the manual those
> are supposed to be attached the fuel tank.
>
> What do I ask for when I go to the dealer to get a replacement?
02-13-2005, 05:26 PM
#6
Guest
Posts: n/a
Re: Mystery valve help needed
Could be your gas tank roll-over check valve. Some attached to the
frame cross member just forward of the tank.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Miguel wrote:
>
> My son's recently acquired '90 YJ (4 cylinder, 5-speed) has been
> smelling of gasoline, and a little checking revealed a broken valve
> tucked up inside the body behind the right rear wheel well. I have a
> factory service manual and have studied it carefully but can't figure
> out the purpose of this valve. It looks to be a check valve, on one
> side there's a line going to the fuel tank and on the other side
> there's a vacuum hose that runs up to the engine compartment. I
> thought mabe it was a rollover valve but according to the manual those
> are supposed to be attached the fuel tank.
>
> What do I ask for when I go to the dealer to get a replacement?
frame cross member just forward of the tank.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Miguel wrote:
>
> My son's recently acquired '90 YJ (4 cylinder, 5-speed) has been
> smelling of gasoline, and a little checking revealed a broken valve
> tucked up inside the body behind the right rear wheel well. I have a
> factory service manual and have studied it carefully but can't figure
> out the purpose of this valve. It looks to be a check valve, on one
> side there's a line going to the fuel tank and on the other side
> there's a vacuum hose that runs up to the engine compartment. I
> thought mabe it was a rollover valve but according to the manual those
> are supposed to be attached the fuel tank.
>
> What do I ask for when I go to the dealer to get a replacement?
02-13-2005, 05:26 PM
#7
Guest
Posts: n/a
Re: Mystery valve help needed
Could be your gas tank roll-over check valve. Some attached to the
frame cross member just forward of the tank.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Miguel wrote:
>
> My son's recently acquired '90 YJ (4 cylinder, 5-speed) has been
> smelling of gasoline, and a little checking revealed a broken valve
> tucked up inside the body behind the right rear wheel well. I have a
> factory service manual and have studied it carefully but can't figure
> out the purpose of this valve. It looks to be a check valve, on one
> side there's a line going to the fuel tank and on the other side
> there's a vacuum hose that runs up to the engine compartment. I
> thought mabe it was a rollover valve but according to the manual those
> are supposed to be attached the fuel tank.
>
> What do I ask for when I go to the dealer to get a replacement?
frame cross member just forward of the tank.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
Miguel wrote:
>
> My son's recently acquired '90 YJ (4 cylinder, 5-speed) has been
> smelling of gasoline, and a little checking revealed a broken valve
> tucked up inside the body behind the right rear wheel well. I have a
> factory service manual and have studied it carefully but can't figure
> out the purpose of this valve. It looks to be a check valve, on one
> side there's a line going to the fuel tank and on the other side
> there's a vacuum hose that runs up to the engine compartment. I
> thought mabe it was a rollover valve but according to the manual those
> are supposed to be attached the fuel tank.
>
> What do I ask for when I go to the dealer to get a replacement?
02-14-2005, 09:11 AM
#8
Guest
Posts: n/a
Re: Mystery valve help needed
I missed the original post, but that is a check valve for the emissions
canister. I have seen those leak fumes before.
I am not sure about the books for those things... The book for my CJ
shows the valve in line like yours, but mine 'is' on/in the tank and the
only YJ one I have seen was up under the wheel well like yours.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
DougW wrote:
>
> Miguel did pass the time by typing:
> > My son's recently acquired '90 YJ (4 cylinder, 5-speed) has been
> > smelling of gasoline, and a little checking revealed a broken valve
> > tucked up inside the body behind the right rear wheel well. I have a
> > factory service manual and have studied it carefully but can't figure
> > out the purpose of this valve. It looks to be a check valve, on one
> > side there's a line going to the fuel tank and on the other side
> > there's a vacuum hose that runs up to the engine compartment. I
> > thought mabe it was a rollover valve but according to the manual those
> > are supposed to be attached the fuel tank.
> >
> > What do I ask for when I go to the dealer to get a replacement?
>
> From what you describe that sounds like the line that vents the fuel
> tank to the charcoal canister up front. It's a check valve that allows
> fuel vapor to run up and get trapped in the canister. The vapors are
> then sucked back into the intake when the engine starts.
>
> Part of the emissions control stuff.
>
> --
> DougW
canister. I have seen those leak fumes before.
I am not sure about the books for those things... The book for my CJ
shows the valve in line like yours, but mine 'is' on/in the tank and the
only YJ one I have seen was up under the wheel well like yours.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
DougW wrote:
>
> Miguel did pass the time by typing:
> > My son's recently acquired '90 YJ (4 cylinder, 5-speed) has been
> > smelling of gasoline, and a little checking revealed a broken valve
> > tucked up inside the body behind the right rear wheel well. I have a
> > factory service manual and have studied it carefully but can't figure
> > out the purpose of this valve. It looks to be a check valve, on one
> > side there's a line going to the fuel tank and on the other side
> > there's a vacuum hose that runs up to the engine compartment. I
> > thought mabe it was a rollover valve but according to the manual those
> > are supposed to be attached the fuel tank.
> >
> > What do I ask for when I go to the dealer to get a replacement?
>
> From what you describe that sounds like the line that vents the fuel
> tank to the charcoal canister up front. It's a check valve that allows
> fuel vapor to run up and get trapped in the canister. The vapors are
> then sucked back into the intake when the engine starts.
>
> Part of the emissions control stuff.
>
> --
> DougW
02-14-2005, 09:11 AM
#9
Guest
Posts: n/a
Re: Mystery valve help needed
I missed the original post, but that is a check valve for the emissions
canister. I have seen those leak fumes before.
I am not sure about the books for those things... The book for my CJ
shows the valve in line like yours, but mine 'is' on/in the tank and the
only YJ one I have seen was up under the wheel well like yours.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
DougW wrote:
>
> Miguel did pass the time by typing:
> > My son's recently acquired '90 YJ (4 cylinder, 5-speed) has been
> > smelling of gasoline, and a little checking revealed a broken valve
> > tucked up inside the body behind the right rear wheel well. I have a
> > factory service manual and have studied it carefully but can't figure
> > out the purpose of this valve. It looks to be a check valve, on one
> > side there's a line going to the fuel tank and on the other side
> > there's a vacuum hose that runs up to the engine compartment. I
> > thought mabe it was a rollover valve but according to the manual those
> > are supposed to be attached the fuel tank.
> >
> > What do I ask for when I go to the dealer to get a replacement?
>
> From what you describe that sounds like the line that vents the fuel
> tank to the charcoal canister up front. It's a check valve that allows
> fuel vapor to run up and get trapped in the canister. The vapors are
> then sucked back into the intake when the engine starts.
>
> Part of the emissions control stuff.
>
> --
> DougW
canister. I have seen those leak fumes before.
I am not sure about the books for those things... The book for my CJ
shows the valve in line like yours, but mine 'is' on/in the tank and the
only YJ one I have seen was up under the wheel well like yours.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
DougW wrote:
>
> Miguel did pass the time by typing:
> > My son's recently acquired '90 YJ (4 cylinder, 5-speed) has been
> > smelling of gasoline, and a little checking revealed a broken valve
> > tucked up inside the body behind the right rear wheel well. I have a
> > factory service manual and have studied it carefully but can't figure
> > out the purpose of this valve. It looks to be a check valve, on one
> > side there's a line going to the fuel tank and on the other side
> > there's a vacuum hose that runs up to the engine compartment. I
> > thought mabe it was a rollover valve but according to the manual those
> > are supposed to be attached the fuel tank.
> >
> > What do I ask for when I go to the dealer to get a replacement?
>
> From what you describe that sounds like the line that vents the fuel
> tank to the charcoal canister up front. It's a check valve that allows
> fuel vapor to run up and get trapped in the canister. The vapors are
> then sucked back into the intake when the engine starts.
>
> Part of the emissions control stuff.
>
> --
> DougW
02-14-2005, 09:11 AM
#10
Guest
Posts: n/a
Re: Mystery valve help needed
I missed the original post, but that is a check valve for the emissions
canister. I have seen those leak fumes before.
I am not sure about the books for those things... The book for my CJ
shows the valve in line like yours, but mine 'is' on/in the tank and the
only YJ one I have seen was up under the wheel well like yours.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
DougW wrote:
>
> Miguel did pass the time by typing:
> > My son's recently acquired '90 YJ (4 cylinder, 5-speed) has been
> > smelling of gasoline, and a little checking revealed a broken valve
> > tucked up inside the body behind the right rear wheel well. I have a
> > factory service manual and have studied it carefully but can't figure
> > out the purpose of this valve. It looks to be a check valve, on one
> > side there's a line going to the fuel tank and on the other side
> > there's a vacuum hose that runs up to the engine compartment. I
> > thought mabe it was a rollover valve but according to the manual those
> > are supposed to be attached the fuel tank.
> >
> > What do I ask for when I go to the dealer to get a replacement?
>
> From what you describe that sounds like the line that vents the fuel
> tank to the charcoal canister up front. It's a check valve that allows
> fuel vapor to run up and get trapped in the canister. The vapors are
> then sucked back into the intake when the engine starts.
>
> Part of the emissions control stuff.
>
> --
> DougW
canister. I have seen those leak fumes before.
I am not sure about the books for those things... The book for my CJ
shows the valve in line like yours, but mine 'is' on/in the tank and the
only YJ one I have seen was up under the wheel well like yours.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
DougW wrote:
>
> Miguel did pass the time by typing:
> > My son's recently acquired '90 YJ (4 cylinder, 5-speed) has been
> > smelling of gasoline, and a little checking revealed a broken valve
> > tucked up inside the body behind the right rear wheel well. I have a
> > factory service manual and have studied it carefully but can't figure
> > out the purpose of this valve. It looks to be a check valve, on one
> > side there's a line going to the fuel tank and on the other side
> > there's a vacuum hose that runs up to the engine compartment. I
> > thought mabe it was a rollover valve but according to the manual those
> > are supposed to be attached the fuel tank.
> >
> > What do I ask for when I go to the dealer to get a replacement?
>
> From what you describe that sounds like the line that vents the fuel
> tank to the charcoal canister up front. It's a check valve that allows
> fuel vapor to run up and get trapped in the canister. The vapors are
> then sucked back into the intake when the engine starts.
>
> Part of the emissions control stuff.
>
> --
> DougW
