Fuel Gauge Reading - Team Camaro Tech
Electrical & Wiring Troubleshooting electrical.

 
LinkBack Thread Tools Display Modes
post #1 of 5 (permalink) Old Aug 12th, 05, 09:44 PM Thread Starter
 
Join Date: Nov 2003
Posts: 62
Question Fuel Gauge Reading

Hello everyone,

I have aftermarket Auto Meter Phantom gauges in my 67

The fuel gauge reading is not accurate and I am looking for a way to calibrate it

When the tank is full the gauge is pegged . . .even past Full

When I am on fumes the gauge waves between 1/2 and 3/4

When I rebuilt the car a few years back I installed a new fuel tank sending unit, locking ring and seal, sending unit filter and wire. I did not change any of the dash or console wiring harnesses

I did not bend or change the sending unit arm from the received position

How can I calibrate the gauge?

I have taken the gauge out of the console and looked for a way to reposition the needle . . .its a sealed unit with all the plastic seams welded . . .no go.

Any ideas would be greatly appreciated.

Thanks
Johnny K is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old Aug 12th, 05, 09:55 PM
Gold Lifetime Member
Jim
 
Join Date: Dec 1999
Location: Yorkville, Illinois USA
Posts: 22,121
Re: Fuel Gauge Reading

Johnny, did that particular guage work ok before you went into the tank? That seams to be what shows between the lines. Camaro's use a 90 ohm fuel sender. Auto meter makes several different part number gas gauges, for different cars that use different ohm value senders. If it never worked right, it's probably the wrong guage for the car. If it did work and doesn't now, it has to be from something in the tank that was changed.

Most likely will be the sender ground wire. This connects from the "cap" on the sending unit to the body above and in front of the gas tank. If it's not there, not connected on one end or the other, or not getting a good connection (paint?) it could cause excessive resistance and give you that bad reading. If you have an ohm meter, read from the (disconnected) tan wire in the trunk to one of the tailight housings. With a full tank it should read 90 ohms. If it doesn't, check from the tan wire to the tank itself. If that reads 90, your ground is bad. If it doesn't, something is wrong with the sending unit.





To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
New website for my vert is coming together. Do ya like the slide show on the home page?
JimM is offline  
post #3 of 5 (permalink) Old Aug 12th, 05, 10:13 PM Thread Starter
 
Join Date: Nov 2003
Posts: 62
Re: Fuel Gauge Reading

Hey Jim,

First off . .great looking 68 vert . .love the stripe

The gauge read wrong from the start. I installed the new gauges the same time as I replaced the sender unit. Not sure if i remember where the tan wire is that you are refering to. Would it come into the trunk area and run the harness down the driver side to the front?

Thanks
Johnny K is offline  
 
post #4 of 5 (permalink) Old Aug 12th, 05, 10:19 PM Thread Starter
 
Join Date: Nov 2003
Posts: 62
Re: Fuel Gauge Reading

Hey Jim,

Just read a post on the same topic from August 8th I see what you are talking about. I will test the tan wire and report back - thanks
Johnny K is offline  
post #5 of 5 (permalink) Old Aug 12th, 05, 10:23 PM
Gold Lifetime Member
Jim
 
Join Date: Dec 1999
Location: Yorkville, Illinois USA
Posts: 22,121
Re: Fuel Gauge Reading

it connects in the trunk, under the gas filler. same place as the plate light





To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
New website for my vert is coming together. Do ya like the slide show on the home page?
JimM is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Fuel Gauge still not working right jackalope Electrical & Wiring 4 Apr 21st, 05 11:26 AM
What's required to put an in dash tach in a 69 non tach car? SolidLifters Tech 2002 6 Mar 6th, 02 09:45 AM
fuel gauge wacked Camaro6666 Electrical & Wiring 11 Jan 9th, 02 03:30 PM
fuel gauge woes Joshua Leslie Tech 2001 1 Aug 31st, 01 11:48 AM
more on my fuel gauge... mike brown Electrical & Wiring 16 Aug 20th, 00 07:04 PM

Posting Rules  
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome