This will take you to the main site where there is history, technical information and other information on these cars.
This takes you back to the main page of the forums.
This is the control panel to change your password, information and preferences on this message board.
Click here if your lost your password or need to register on this message board. You must be a registered user to post. Registration is free.
Search this board for information you need.
Click here to buy cool Squarebirds mechandise.
Click here to support Squarebirds.org. For $20 annually receive 20mBytes webspace, a Squarebirds e-mail address and member's icon on the message board.
  #1  
Old 08-25-2014, 09:53 PM
Dan.loeb Dan.loeb is offline
Experienced
 
Join Date: Aug 2 2014
Posts: 105
Dan.loeb is on a distinguished road
Default Gas gauge pegs to full

Hey guys,

I just finished pulling the dash from the bird and after reinstallation of all the gauges the has gauge pegs to full after key is turned to the on position. Right now I have the constant voltage regulator for the temp and gas gauge hanging under the dash because I want to relocate it to a better accessible area. Could it be a grounding issue with the constant voltage regulator causing the issue.


I also finished rewiring the rear tail lights and found some loose grounds in the rear. Could one of the grounds be for the rear sending unit for the gas gauge?

Gas gauge was working prior to pulling the dash.
Reply With Quote
  #2  
Old 08-25-2014, 10:33 PM
Tbird1044 Tbird1044 is offline
Super-Experienced
 
Join Date: Jul 31 2012
Posts: 1,042
Tbird1044 is on a distinguished road
Default

If my memory is correct, if you ground the wire at the gas tank sending unit, the gauge will read FULL. This is exactly opposite of GM.
I'll attach a pretty good pic of the instrument gauge wiring. Copy it to your computer, so you can enlarge it for a better view. Make sure all the wiring is correct. Also, an easy check to see if the CVR needs to be grounded, is to run a ground jumper to the hanging CVR. See if things change. If things don't change, start checking the wire going back to the gas tank sending unit. It sounds like it is grounded.
Nyles
Attached Images
File Type: jpg Instrument Cluster Circuit.jpg (101.6 KB, 79 views)
Reply With Quote
  #3  
Old 08-26-2014, 12:01 AM
simplyconnected's Avatar
simplyconnected simplyconnected is offline
Slow Typist
 
Join Date: May 26 2009
Posts: 7,080
simplyconnected is on a distinguished road
Default

Yes, the CVR must be grounded. You can burn out your gauges if you don't ground the CVR because the gauges are designed to be run on pulsating 12 volts. The CVR works like a flasher unit; an internal heating element causes 12 volt current to pass half the time and turn off half the time, giving a 50% duty cycle.

If you have no ground on the CVR, you are putting constant 12 volts on your gauges. They won't last long that way.

The sending unit in your gas tank depends on solid ground passing through the body, to the battery. I always run a separate copper stranded wire for my grounds, like modern cars have. - Dave
__________________
My latest project:
CLICK HERE to see my custom hydraulic roller 390 FE build.

"We've got to pause and ask ourselves: How much clean air do we need?"
--Lee Iacocca
Reply With Quote
  #4  
Old 08-26-2014, 12:05 AM
Tbird1044 Tbird1044 is offline
Super-Experienced
 
Join Date: Jul 31 2012
Posts: 1,042
Tbird1044 is on a distinguished road
Default

Dan:
You never mentioned if you are using the original CVR or have upgraded to the solid state model. Most of the guys here recommend using the solid state CVR's to add additional protection for your gauges.
Nyles
Reply With Quote
  #5  
Old 08-26-2014, 12:39 AM
simplyconnected's Avatar
simplyconnected simplyconnected is offline
Slow Typist
 
Join Date: May 26 2009
Posts: 7,080
simplyconnected is on a distinguished road
Default

I believe Dan is using the original mechanical CVR.

Dan, I offer a good price on solid state CVRs to paid members of Squarebirds.org. I convert them myself. - Dave
__________________
My latest project:
CLICK HERE to see my custom hydraulic roller 390 FE build.

"We've got to pause and ask ourselves: How much clean air do we need?"
--Lee Iacocca
Reply With Quote
  #6  
Old 08-26-2014, 12:12 PM
Dan.loeb Dan.loeb is offline
Experienced
 
Join Date: Aug 2 2014
Posts: 105
Dan.loeb is on a distinguished road
Default

I am currently running the original CVR. I will ground it out tonight and make sure everything is working. Hopefully my gauge is not burnt out. I need to replace it either way in the near future since the Temp gauge needle is broken.
Reply With Quote
  #7  
Old 08-26-2014, 01:04 PM
simplyconnected's Avatar
simplyconnected simplyconnected is offline
Slow Typist
 
Join Date: May 26 2009
Posts: 7,080
simplyconnected is on a distinguished road
Default

Quote:
Originally Posted by Dan.loeb View Post
... the Temp gauge needle is broken.
Huh? How on earth did it break? The only needle on a pivot shaft is the speedometer. The others are simple sheet metal.

Wait a minute... How is the needle broken? Can you take a picture? Send it to:
simplyconnected@aol.com
__________________
My latest project:
CLICK HERE to see my custom hydraulic roller 390 FE build.

"We've got to pause and ask ourselves: How much clean air do we need?"
--Lee Iacocca
Reply With Quote
  #8  
Old 09-13-2014, 06:01 PM
simplyconnected's Avatar
simplyconnected simplyconnected is offline
Slow Typist
 
Join Date: May 26 2009
Posts: 7,080
simplyconnected is on a distinguished road
Default

What ever happened with this, Dan?
__________________
My latest project:
CLICK HERE to see my custom hydraulic roller 390 FE build.

"We've got to pause and ask ourselves: How much clean air do we need?"
--Lee Iacocca
Reply With Quote
  #9  
Old 09-13-2014, 09:51 PM
Dan.loeb Dan.loeb is offline
Experienced
 
Join Date: Aug 2 2014
Posts: 105
Dan.loeb is on a distinguished road
Default

CVR was not grounded causing it to PEG to full. I went ahead and mounted the CVR where the car amplifier for the radio was installed under the driver side dash. Much easier to access now and the gauge works perfectly.
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

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


All times are GMT -4. The time now is 04:13 AM.

Driving, racing or working on cars can be hazardous. The procedures and advice on this website including the message board are opinion only. Squarebirds.org and its webmasters and contributors do not guarantee the correctness of the advice and procedures. The Squarebirds.org and its webmasters assume no liability for any damage, fines, punishment, injury or death resulting from following these procedures or advice. If you do not have the skills or tools to repair your car, please consult a professional. By using this site you agree to hold harmless the Squarebirds.org, its authors and its webmasters from any resulting claim and costs that may occur from using the information found on this site.

Powered by vBulletin® Version 3.6.8
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Any submissions to this site and any post on this site becomes property of Squarebirds.org . The webmasters reserve the right to edit and modify any submissions to this site. All material on this is site is copyrighted by the Squarebirds.org. Reproduction by any means other than for personal use is strictly prohibited. Permission to use material on this site can be obtained by contacting the webmasters. Copyright 2002-2016 by Squarebirds.org.