Mystery valve help needed

Feb 13, 2005 16 Replies

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?


Miguel did pass the time by typing:

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.

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:

Take the valve off and take it to the store with you. Drop it on the counter and say, "I need one of these." The guy will disappear to the back of the store for a few minutes, when he returns he will have a part. Make sure the part looks like the one you brought into the store. Take the part home and hook it up.

Have a beer and admire your repair.

i want to go to that parts store! whenever i stop in for anything the guy has to know the make, model, engine size, mothers maiden name and shoe size before he can look up the wrong part on his computer.

wall

As long as the doohicky they give you looks like the doohicky you carried in, then all is well.

My parts guy at NAPA builds custom cars, when he see me coming, he knows the book is at best a starting point. Amazingly, when I bring in the various assorted doohickies - Bill's word - my parts guy usually knows what it is. He needs the make and model just to confirm his suspicions.

My NAPA store is a Commerical Truck center, or some such thing. The guys in there are better than your average parts guys. If they come out from the back with the wrong part, they can normally cross reference whatever I walked in with and I leave with a part that works.

Guys like that are worth their weight in gold!

Mike

86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's

Jeff Strickland wrote:

Mike Romain did pass the time by typing:

And Gals too. Especially the gal that works at one of the local NAPA stores. Killer sense of humor. I was buying some plugs/wires/etc and she asked if I wanted to buy a paper weight. I said "huh?" and she pointed to the stack of air-tornado thingies and said that that's all the ___(1) good those are for. :)

(1) this post has been made child safe, please substitute the Adjective form of a four letter words starting with fu and ending with ing.

You are right there, most of the bone heads behind the counter would not know a widget from a thingamabob, heck they are luck if they could find their butt with both hands on it and then they would need pictures and detailed instructions with a GPS. HarryS

That's because you're talking to the wrong guy. You want the one wearing a different-colored shirt. He will likely be the only one there without pimples. He will not only know what the part is and why it broke, he will know how to find it without using the computer. He will also know where you can get the part if he doesn't have it.

-- "I defer to your plainly more vivid memories of topless women with whips....r" R. H. Draney recalls AFU in the Good Old Days.

Are you sure? I think it is a late-design Gozzinta. In any case, it isn't a Duflickus, that much is clear.

-- "I defer to your plainly more vivid memories of topless women with whips....r" R. H. Draney recalls AFU in the Good Old Days.

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