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
- - - - -

fuel sending unit resistance values


  • Please log in to reply
2 replies to this topic

#1 chopsubie

chopsubie

    New User

  • Members
  • PipPip
  • 22 posts
  • Kenai

Posted 19 January 2014 - 08:22 AM

Can anyone tell me the stock resistance values for the fuel sending unit (in an 82 gl wagon). The fuel tank is gone, so I would like to fab a fuel cell and equip with a universal fuel sending unit to work with the factory fuel gage. Even if someone knows a close value i.e. 0-100 ohm?
I'll hook a resistor and a rheostat up to the gage and dial it around until I find the empty and full values if I don't hear anything back. Thanks

#2 Gloyale

Gloyale

    It's a sickness

  • Members
  • 9,407 posts
  • Corvallis, OR PNW

Posted 19 January 2014 - 02:00 PM

7 ohms Empty

 

32.5 Ohms Half tank

 

95  Ohms Full tank



#3 chopsubie

chopsubie

    New User

  • Members
  • PipPip
  • 22 posts
  • Kenai

Posted 20 January 2014 - 01:35 AM

Thanks for the response, however that is not what I found this morning with some inline resistors and potentiometer. 4ohms takes the needle right to the top of the printed full mark, and 69 ohms brought the needle just to the bottom of the empty marking. 0 resistance,aside from the very small amount in the conductors takes the gage needle to about 110%, 90 ohms sends the needle below the empty mark about -10%. A universal sending unit of 0-90 ohm Connected in series to a 4 ohm resistor would give me an accurate full level indication, and a conservative empty indication.
I'm sure there are some deviations in the accuracy of the gage coils from car to car, and for cars with poor charging systems. I ran my test with a 13.5 vdc supply.
Thanks again for the reply, it has been years since my last post.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users