Welcome to the North American Subaru Impreza Owners Club Tuesday July 22, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Subaru Models > Legacy Forum

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 07-27-2010, 07:00 PM   #1
kirbykirb
Scooby Newbie
 
Member#: 183596
Join Date: Jul 2008
Chapter/Region: South East
Location: USA
Vehicle:
2005 WRX/9-2x
Obsedian Black Pearl

Default Gas Gauge reads inaccurately in 96' BG.

Basically it's like this.... it's a 96' Outback 2.5L.

If I fill it up with 16 gallons it fills up; but whenever 6-8 gallons go through it'd move to the EMPTY. It's 50% or so inaccurate, but still works; when I fill up the car it does go up.

So; do I need to replace a fuel sender? fuel pump, or what? Maybe I can repair mine.. I don't know. What advice do you guys have?
* Registered users of the site do not see these ads.
kirbykirb is offline   Reply With Quote
Old 07-27-2010, 07:04 PM   #2
kirbykirb
Scooby Newbie
 
Member#: 183596
Join Date: Jul 2008
Chapter/Region: South East
Location: USA
Vehicle:
2005 WRX/9-2x
Obsedian Black Pearl

Default

Also forgot to add; the fuel light does not come up when I have 1-2 gallons left in the car?

I measured this by how much gas I add to the car and it comes around to 14 or so gallons.
kirbykirb is offline   Reply With Quote
Old 07-27-2010, 10:18 PM   #3
Patrick Olsen
NASIOC Supporter
 
Member#: 120
Join Date: Jul 1999
Chapter/Region: AKIC
Location: Where the Navy sends me...
Vehicle:
1997 Legacy 2.5GT
QuickSilver Metallic

Default

I would guess you'd need a new fuel sender. I'm away from home right now, so I can't look at it, but I'd bet that the Haynes Manual has resistance values for empty and full so you can measure whether the sender is bad or not.

Pat Olsen
Patrick Olsen is offline   Reply With Quote
Old 07-27-2010, 10:34 PM   #4
daleyswanson
Scooby Specialist
 
Member#: 205604
Join Date: Mar 2009
Chapter/Region: NWIC
Location: Portland
Vehicle:
87J Robinson
R22

Default

Mine is inaccurate as well. There is a DIY that supposedly helps on sli or legacygt. I can't remember which. It involves removing the sender and sanding down the brass receiver if i recall.
daleyswanson is offline   Reply With Quote
Old 07-28-2010, 11:25 PM   #5
ReubenH
Scooby Specialist
 
Member#: 172522
Join Date: Feb 2008
Chapter/Region: International
Location: Queenstown, New Zealand
Vehicle:
1998 Legacy GTB Ltd.
Black

Default

Quote:
Gas Guage reads inaccuratley in 96' BG.
There's a saying in the aviation world, which i've repeated here many a time.

There's only 2 times a fuel gauge will ever read correctly. Absolute full, and absolute empty.
ReubenH is offline   Reply With Quote
Old 07-29-2010, 08:00 PM   #6
TjCombs89
Scooby Newbie
 
Member#: 253398
Join Date: Jul 2010
Default

my subaru does the same thing, let me know if you figure out how to fix it
TjCombs89 is offline   Reply With Quote
Old 07-29-2010, 11:35 PM   #7
Jonathan
Scooby Guru
 
Member#: 4021
Join Date: Feb 2001
Chapter/Region: NESIC
Location: Natick, MA USA
Vehicle:
1999 Legacy GT Ltd
Quick Silver Metallic

Default

I *think* with the "new" submersible fuel pumps many manufacturers design their fuel senders to intentionally read "low" or "empty" when there is still plenty of fuel in the tank.

The idea being to make sure you keep plenty of fuel in the tank. Running below 1/4 of a tank means that often times your submersible fuel pump isn't always submerged and in some cases could be running "dry". Their usable service life declines drastically when they are attempting to pump fuel that isn't there. Also they depend on being submerged in fuel to help keep the pump cool.

These things can cost serious money to replace.

My advice would be to live with it the way it is and make sure you still have plenty of fuel in the tank between fill up.
Jonathan is offline   Reply With Quote
Old 07-31-2010, 10:42 PM   #8
Navi271
Scooby Newbie
 
Member#: 203099
Join Date: Feb 2009
Chapter/Region: MWSOC
Location: Ankeny/Ames, IA
Vehicle:
1995 Legacy Wagon
Winter Green Metallic

Default

There's a giant thread about this at sl-i.net, and the general consensus there is that most 95-99 legacy's have this problem. They must have been built with some crappy stuff that doesn't accurately read the fuel level after years of use. Mine does it too. My gauge will hit E when I have about 5 gallons left. I just keep track of the gas mileage and reset the trip counter every time I fill up, so I know about how much gas I actually have! My low gas light has never come on... EVER! I swear the light looked fine last time I had the gauges out...

I agree with jonathan, live with it! That's what I do, because like you said, "it still works" so why fix it?! ... still is annoying tho...
Navi271 is offline   Reply With Quote
Old 08-01-2010, 01:35 PM   #9
kirbykirb
Scooby Newbie
 
Member#: 183596
Join Date: Jul 2008
Chapter/Region: South East
Location: USA
Vehicle:
2005 WRX/9-2x
Obsedian Black Pearl

Default

Quote:
Originally Posted by Navi271 View Post
There's a giant thread about this at sl-i.net, and the general consensus there is that most 95-99 legacy's have this problem. They must have been built with some crappy stuff that doesn't accurately read the fuel level after years of use. Mine does it too. My gauge will hit E when I have about 5 gallons left. I just keep track of the gas mileage and reset the trip counter every time I fill up, so I know about how much gas I actually have! My low gas light has never come on... EVER! I swear the light looked fine last time I had the gauges out...

I agree with jonathan, live with it! That's what I do, because like you said, "it still works" so why fix it?! ... still is annoying tho...
That's what i've been doing, I can get to around 220 miles and have 3-4 gallons left (to my surprise).

I just need to be getting a scanguage though. :| I would so love the feature of having my MPG read, and fuel level left and etc... one reason I loved E36's. <3
kirbykirb is offline   Reply With Quote
Old 08-02-2010, 05:47 AM   #10
Patrick Olsen
NASIOC Supporter
 
Member#: 120
Join Date: Jul 1999
Chapter/Region: AKIC
Location: Where the Navy sends me...
Vehicle:
1997 Legacy 2.5GT
QuickSilver Metallic

Default

The Haynes Manual says the resistance of the sender should be ~50ohm when the tank is near empty, and ~1ohm when it is full. On the AWD cars there are two sending units - the driver side is just a sending unit, the passenger side is integrated with the fuel pump assembly.
Patrick Olsen is offline   Reply With Quote
Old 08-02-2010, 03:36 PM   #11
Navi271
Scooby Newbie
 
Member#: 203099
Join Date: Feb 2009
Chapter/Region: MWSOC
Location: Ankeny/Ames, IA
Vehicle:
1995 Legacy Wagon
Winter Green Metallic

Default

Haha! It's funny that you're talking about a scangauge, because I've been using one for more than a year now! It's pretty accurate too. Last time I filled up it was only like .2 gallons off with how much gas I actually used.
Navi271 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
gas gauge doesnt read correctly t00sl0w Factory 2.0L Turbo Powertrain 13 11-14-2009 08:01 PM
My Omori boost gauge whines, inaccurate. Superorb Electrical & Lighting 4 05-21-2007 06:18 PM
which gauges read in psi? bluperlrex Factory 2.0L Turbo Powertrain 11 05-07-2002 09:10 AM
What Should An Oil Presure Gauge Read In A Wrx 02 GM991 Factory 2.0L Turbo Powertrain 1 01-31-2002 10:55 AM
My gas gauge reads 50% off. anyone else? Eric SS General Community 15 12-20-2001 08:42 AM


All times are GMT -4. The time now is 12:24 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.