Fuel gauge empty at 1/2 - Defender Source
Defender Source  

Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions


Reply
 
Thread Tools
  #1  
Old March 18th, 2014, 10:17 PM
Chris Velardi's Avatar
Chris Velardi
Status: Offline
Chris Velardi
1975 101FC
Member
 
Join Date: May 2009
Location: Hamden, CT USA
Posts: 424
Fuel gauge empty at 1/2

Anyone have insight to fix my issue , my fuel gauge is reads from full to 1/2 full, just before 1/2 full the low fuel light starts flashing and when it hits half its stays lite solid (empty) it is a petrol V8 1985 110
__________________
Chris "V"
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old March 18th, 2014, 10:23 PM
Jymmiejamz's Avatar
Jymmiejamz
Status: Offline
Jimmy
1995 D90 SW #365
Member
 
Join Date: Sep 2010
Location: Brooklyn, NY
Posts: 3,468
Registry
My first inclination would be a bad fuel level sending unit, but it could be a problem with the wiring anywhere between the sending unit and gauge.
__________________
Car Camping Collective founding member and Treasurer
Reply With Quote
  #3  
Old March 18th, 2014, 11:36 PM
Chris Velardi's Avatar
Chris Velardi
Status: Offline
Chris Velardi
1975 101FC
Member
 
Join Date: May 2009
Location: Hamden, CT USA
Posts: 424
Can sending units be fixed or just best to replace them , Anyone in the US got them relatively cheep
__________________
Chris "V"
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old March 18th, 2014, 11:52 PM
Rocky's Avatar
Rocky
Status: Offline
Chris
72 + D1 drivetrain
Member
 
Join Date: Sep 2006
Location: Colonies Aka Boston
Posts: 8,769
Good news Chris, this proves your low fuel light works!
__________________
A friend of mine runs a land rover / range rover specialty repair shop. Based on his experience, they are capable of stopping anywhere, anytime, at any cost.

I don't know about the brakes, only their unreliability.
Reply With Quote
  #5  
Old March 19th, 2014, 12:12 AM
RovingRyan's Avatar
RovingRyan
Status: Offline
Ryan Phelps
84 LHD 110
Member
 
Join Date: Sep 2011
Location: PNW
Posts: 276
Registry
The ground path for the gauge is carried through the chassis. I would check/clean the ground and see if that is better. On my 84 i had a faulty gauge and sender. I replaced both and the the gauge read a little on the high side, I have since switched to the vdo gauge and have yet to run a tank through it so Im not sure how accurate it is now.
__________________
Ryan
84 110SW County LHD
07 L322 Vogue
Reply With Quote
  #6  
Old March 19th, 2014, 06:27 AM
Capt Milks's Avatar
Capt Milks
Status: Offline
Mike
Defender V-8, Defender 2.25
Member
 
Join Date: Oct 2004
Location: United States
Posts: 1,798
It could also be a float that has a hole in it. After checking the wiring you may want to pull the sending unit to check it out.
Reply With Quote
  #7  
Old March 19th, 2014, 08:08 AM
rdavisinva's Avatar
rdavisinva
Status: Online
Robert Davis
N/A
Member
 
Join Date: Oct 2004
Location: USA
Posts: 6,785
Had the same issue on my 1985 110.
When I replaced the tank and installed a new sending unit the gauge worked as expected.
__________________
RDavisinVA

Uncle "Richard" Douglas has a Land Rover with big wheels that never gets stuck... until he breaks something so it won't go. Uncle Douglas always breaks something. - Anna Crowther at the Conclave 2012 (AKA Carburetor Neck)

"What's with this death wobble, Uncle Douglas, I can't keep it in 1 lane?"
UD: "Just Power through it man!"
Reply With Quote
  #8  
Old March 19th, 2014, 09:22 AM
Overlander's Avatar
Overlander
Status: Offline
mark kellgren
in between D's in an 04 D2
Member
 
Join Date: Mar 2006
Location: Charlotte, NC
Posts: 6,531
Registry
could also be a mismatch between sender and gauge if either have been replaced recently. unlikely but putting it out there.
__________________
Mark Kellgren
KM4BOR

ISIL and al qaeda can go F*ck themselves...
Reply With Quote
  #9  
Old March 19th, 2014, 02:44 PM
Viton's Avatar
Viton
Status: Offline
Deaf Ember
Smart 4x4
Member
 
Join Date: Jan 2009
Location: La
Posts: 1,231
My experience was, I'd had the fuel tank off and upon re-installation, reversed the lines at the tank. The return line doesn't go to the bottom of the tank, so it would "run out of fuel" while the tank was still half full.
Reply With Quote
  #10  
Old March 19th, 2014, 08:35 PM
Chris Velardi's Avatar
Chris Velardi
Status: Offline
Chris Velardi
1975 101FC
Member
 
Join Date: May 2009
Location: Hamden, CT USA
Posts: 424
My problem is the tank is empty at 1/2 full ( with idiot light on) . Stays at full until a 1/2 hour of driving then it drops to 3/4 get a flash every now and then , then it drops to half and she if out of fuel.
__________________
Chris "V"
Reply With Quote
  #11  
Old March 19th, 2014, 09:24 PM
Rocky's Avatar
Rocky
Status: Offline
Chris
72 + D1 drivetrain
Member
 
Join Date: Sep 2006
Location: Colonies Aka Boston
Posts: 8,769
Then she calls you to come and rescue her!
This is a problem.
__________________
A friend of mine runs a land rover / range rover specialty repair shop. Based on his experience, they are capable of stopping anywhere, anytime, at any cost.

I don't know about the brakes, only their unreliability.
Reply With Quote
  #12  
Old March 19th, 2014, 09:26 PM
Red90's Avatar
Red90
Status: Offline
John B.
1991 Defender 90, 200TDI
Site Team
 
Join Date: Sep 2003
Location: Calgary
Posts: 9,231
Registry
Either the sender is bad or it is wired wrong then. The senders do wear out. They are pretty serious low tech....and cheap.
__________________
Pissing people off on the "net" since 1983.

Land Rover. Turning owners into mechanics since 1948.
Reply With Quote
  #13  
Old March 20th, 2014, 12:26 AM
RovingRyan's Avatar
RovingRyan
Status: Offline
Ryan Phelps
84 LHD 110
Member
 
Join Date: Sep 2011
Location: PNW
Posts: 276
Registry
You can check the sender output by measuring the resistance to ground. It is really hard to say for sure where your problem lies without doing any further tests. The following ristance values were pulled from another post.
FULL - 19 OHMS
3/4 - 38 OHMS
1/2 - 67 OHMS
1/4 - 116 OHMS
Reserve - OHMS
Empty - 270 OHMS

Once you have tested at the sending unit you can then test at the gauge and you should have the same readings. If your readings match the above mentioned values your gauge is faulty. If they don't then your sending unit is faulty. Good luck..
__________________
Ryan
84 110SW County LHD
07 L322 Vogue
Reply With Quote
  #14  
Old March 20th, 2014, 05:53 AM
Chris Velardi's Avatar
Chris Velardi
Status: Offline
Chris Velardi
1975 101FC
Member
 
Join Date: May 2009
Location: Hamden, CT USA
Posts: 424
I'll pull and check it , thanks
__________________
Chris "V"
Reply With Quote
Reply

Lower Navigation
Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions

Tags
fuel

Thread Tools

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
fuel gauge ohm range naeirie Defender Technical Discussions 35 September 6th, 2017 02:49 PM
D90 Fuel pump stays on jackaaaps Defender Technical Discussions 0 January 23rd, 2014 09:46 PM
300 Tdi Egt Q?????? Buckon37s Defender Technical Discussions 37 July 11th, 2012 11:26 AM
Fuel gauge - no reading JackW Defender Technical Discussions 2 October 11th, 2005 03:50 PM
Help wth Fuel Gauge (that works sometimes) ToyCrusher Defender Technical Discussions 14 October 20th, 2004 08:43 PM


All times are GMT -5. The time now is 05:10 PM.


Copyright