Somg testing and EVP leak

R

Richard

Member
Just had my 77 SSII / 345 / 2bbl. / 727 tf / d44's front and back,
smog tested. Everything went fine and it actually passed with flying colors, until they got to the fuel tank.

The guys put a vacuum hose on the gas filler neck opening. Ran their machine and then told me that there is a "leak" somewhere in the lines. I'm guessing it is either the fuel lines or the air vapor lines. Or could it be the gas tank itself. Or maybe the plastic canister inside the rear quarter panel behind the gas filler neck?

Any ideas on where to start? I'm guessing that I can change out all of the rubber lines, "to and fro" ? Never had this problem before so this is a first. Anybody have a similar problem?

Any ideas?
 
richard said:
just had my 77 SSII / 345 / 2bbl. / 727 tf / d44's front and back,
smog tested. Everything went fine and it actually passed with flying colors, until they got to the fuel tank.

The guys put a vacuum hose on the gas filler neck opening. Ran their machine and then told me that there is a "leak" somewhere in the lines. I'm guessing it is either the fuel lines or the air vapor lines. Or could it be the gas tank itself. Or maybe the plastic canister inside the rear quarter panel behind the gas filler neck?

Any ideas on where to start? I'm guessing that I can change out all of the rubber lines, "to and fro" ? Never had this problem before so this is a first. Anybody have a similar problem?

Any ideas?
Click to expand...

Dealing with the ees system onna 33 year old vehicle is a major bitch. The nylon tube plumbing is very durable. All the rubber pigtail connections are rotten though so replace 'em all. Same for the filler neck connection.

It's possible that some of the plastic componentry of both the charcoal canister and the condensing unit have cracks due to deterioration over the ages. Use low pressure air to check those items.
 
Additionally, does anyone have a diagram of the lines going to and from the gas tank? The vapor collector next to the gas tank filler neck? This is for a 1977 SSII / /345 / 2bbl.

Thanks,
 
richard said:
additionally, does anyone have a diagram of the lines going to and from the gas tank? The vapor collector next to the gas tank filler neck? This is for a 1977 SSII / /345 / 2bbl.

Thanks,
Click to expand...

Here is the ees diagram, it's the same for m/y 1973>1980 Scout II, terra, and traveler.
 

Attachments

  • Scout II EES System.PDF
    1.6 MB · Views: 397
Mm:

thanks for the diagram. You rock!!! Now I get to "jack" around with this smog crap next weekend.

Thanks,
 
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