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
 

Photo
- - - - -

circa 1980 emission controls


  • Please log in to reply
1 reply to this topic

#1 wrw166

wrw166

    New User

  • Members
  • PipPip
  • 26 posts
  • las vegas

Posted 26 May 2005 - 02:36 PM

++++++++++++++++++++++

just can't bring myself to post this in the tech forum......but I've been making progress on my 1980 rat's nest of vauum tubes!

i've isolated each device: distributor; vacuum control module for the coasting bypass valve in the carburetor; EGR; antibackfire valve. All temp control valves and solenoids bypassed for now.

Here's the breakthru: I use drip irrigation 1/4 inch tubing "flag" emmiters as inline vacuum tube orifices. i use 4gallon per hour (4gph), 8gph, and 16gph.

By driving around with a big vacuum guage in the windshield i connect and disconnect each device separately in order to become familiar with each devices' funtion and then regulate it's operation.

By this method I've adjusted the vacuum control module for the coasting bypass valve, limited the maximum opening of the "EGR, and made the antibackfire valve operate as intended (this one is trickey because it uses a regulating dual diaphram control sytem similar to the distributor. to increase the antibackfire effect you restrict the upper hose with a smaller orifice..

These devices are no longer a mystery and i have found many cracked hoses. comments welcome

#2 Zefy

Zefy

    1000+ Super USER!

  • Members
  • 1,171 posts
  • Coquitlam B.C. Canada

Posted 28 May 2005 - 06:01 PM

hey you really sound like you got this stuff down!

boy do i wish you were close by... i'm still trying to get my car to give me better then 15-17mpg...

vacuum hoses confuse me... and hey if you need any info from a FSM i can scan a few pages to clear up anything...




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users