Jump to content

Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse

- - - - -

"Fuel evaporative controls functional" failed smog

  • Please log in to reply
1 reply to this topic

#1 somick


    92 Loyale

  • Members
  • 377 posts
  • alaska

Posted 01 August 2011 - 12:22 PM

92 Loyale, FWD. 170000 miles.
Googled for solutions. They say that I need to chase a line from the fuel tank to the canister. There might be a cracked hose or something.
Can anybody provide more details on that?
I would guess that a fuel cap might be at fault as well.

Thank you,

#2 somick


    92 Loyale

  • Members
  • 377 posts
  • alaska

Posted 09 August 2011 - 01:04 PM

The tech most likely did not hook the test machine correctly! I checked everything I could myself and found nothing.

I decided to pay them for diagnostics. Guess what? They hooked their equipment, test it again and I passed.

For those who need information on this problem here is sources I was able to find:


Here is some excerpts from that page:

Checking for faulty canister:
Detach the canister from the firewall.
Detach the intake tube hose and put your fingers on the end of the canister inlet fitting.
Warm the engine to normal operating temperature, then increase the engine speed to 2500 rpm. If the canister is functioning correctly, air will be drawn into the canister through the inlet tube and you will feel suction. If you don't feel suction, replace the canister.

this is for those who have fail the EVAP during the functional smog test.


We pinch off the vapor line from the gas tank at the cannister and put an adapter in the filler neck and pump a 1/2 lb of pressure into the tank. The test machine checks for small leaks.

This being said it is either the tank, the filler neck, or the vapor line from the tank to the cannister.
Included in "tank" is the seal for the fuel pump/ sending unit.


0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users