Do I need a new fuel sending unit? - Team Camaro Tech
Electrical & Wiring Troubleshooting electrical.

LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old Mar 18th, 15, 07:17 AM Thread Starter
Gold Lifetime Member
Join Date: Sep 1999
Location: Missouri
Posts: 2,463
Send a message via AIM to Winch Send a message via MSN to Winch
Do I need a new fuel sending unit?

My 68 was restored several years ago which included a new gas tank and sending unit. I added aftermarket console with gauges. The low FUEL warning light comes on a lot especially when I round a corner and it will occur with half a tank of gas.

How accurate are the low FUEL warning systems you guys that have them? Does it sound like the sending unit?
Winch is offline  
Sponsored Links
post #2 of 4 (permalink) Old Mar 18th, 15, 07:26 AM
click's Avatar
Join Date: Jun 2001
Location: Central Minnesota
Posts: 15,985
Re: Do I need a new fuel sending unit?

My low fuel light would come on and off when I was near 1/4 left in the tank. The float arm in the tank can be 'adjusted' by bending it so it registers close to what you want, Sadly its a mess to drop the tank, adjust the arm (like your toilet float adjusting), then go for awhile and see how it reacts to that adjustment. I left mine alone and just knew I was above 1/4 when the light started to flicker on curves or hills etc. I dont know of any other way to adjust it. Jim..former owner of a 69RS-LM1 350/255 - 700r
"There will come a time when you believe everything is finished,
That will be the beginning." Louis L'Amour
click is offline  
post #3 of 4 (permalink) Old Mar 18th, 15, 06:38 PM
Admin/Super Moderator
69-Pace's Avatar
Join Date: Jun 2010
Location: Connecticut USA
Posts: 12,509
Re: Do I need a new fuel sending unit?

As Jim said the float moves a lot in the tank and the original style LFWM units only have a fixed set-point. Reach it and it triggers whether its for a micro second or ten minutes.

The replacement style unit from M & H electric allows you to set the set-point and has the ability to buffer the set point for a few seconds so those mach 2 corners we take won't trigger on a temporary drought in the tank.

The pros of using this system is that it allows you to set a more realistic set-point. The factory 1/8 to 1/4 is unrealistic these days. In the late 60's there were gas stations on every corner, now they have been replaced by bigbox drugstores. You can also install this module in vehicles that do not have the console gauge package and piggyback it off the dash carrier fuel gauges, and simply run a circuit to the existing 69 FUEL light option.

The cons of the unit would be it is a flat box with no real mounting considerations but it can live comfortably under the gauge pack of the console. If added to vehicle without console gauges you can velcro it to the back of the dash carrier or zip tie it away from danger.

Part number 500274 (1967,68,69) $60.00

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

1969 Z11 Pace Car - L48 350cid/300hp - 4 Speed Muncie 12 bolt rear.

Super Moderator Team Camaro
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
to send me a private message
69-Pace is offline  
post #4 of 4 (permalink) Old Mar 18th, 15, 07:28 PM
Vega$69's Avatar
Join Date: Sep 2010
Location: Vegas NV/Wesley Chapel FL
Posts: 12,893
Re: Do I need a new fuel sending unit?

I'm using a tube style sender from Classic Instruments in my EFI tank. the movement of the fuel in the tank has little if any effect on the gauge.

I'm not sure if they are available for OEM tanks.
Vega$69 is offline  
Sponsored Links

Quick Reply

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


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:


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

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