EVAP two way valve disconnected

Tiny
LAURO VALDEZ
  • MEMBER
  • 1991 HONDA CRX
  • 1.5L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 275,000 MILES
My fuel tank is leaking gas and I suspect it may be the two way valve. I replaced all the hoses and clamps and it still leaking. My problem is that the two way valve for my car is discontinued and I haven't been able to find a replacement part for it. Please help.
Monday, July 22nd, 2019 AT 11:41 AM

3 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Hi Lauro,

Unfortunately, there is no easy solution. However, the best thing I think you can do it find a donor vehicle and take the part off of that vehicle. The best way to find that vehicle is a salvage yard. Clearly this is a gamble because you don't know what you are getting but it is the easiest and best way to find one. Just be prepared to go through a couple of parts but I am sure you will find one that works.

Let me know what you find and we can go from there.
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Monday, July 22nd, 2019 AT 7:31 PM
Tiny
LAURO VALDEZ
  • MEMBER
  • 2 POSTS
How can I diagnose my current 2 way valve or any other valve I find from the salvage yard to determine if it's working properly or not?
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Tuesday, July 23rd, 2019 AT 11:05 AM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Here is the description of the two way valve. As you see it operates when the fuel tank pressure builds and then it opens. You can remove yours and hook up a handle held vacuum pump and see if it opens. Also, you should be able to have it build a vacuum before it opens. If when pumping it doesn't build any pressure then it is stuck open.

Have you pinpointed where this leak is coming from? The reason I ask, is the two way valve just vents the vapor to the canister and not to the atmosphere. So if you have an issue with this valve then you may have fuel in the canister and if that is the case then you need to replace that as well.
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Tuesday, July 23rd, 2019 AT 6:59 PM

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