Home page

fuel gauge

Forum: C3 HVAC, Fuel, Emissions, and Exhaust

5 Messages
Page 1 of 1
Share:
Sponsored Content

Already a Member?

Welcome back! Access your account.

Sign In

Not yet a Member?

Join our community! Registration is free.

Join Free

fuel gauge

Posted: 3/17/17 8:52amMessage 1 of 5
r
Free Member
Send PM
Suffolk, VA - USA
Joined: 7/24/2012
Posts: 140
Vette(s): 2009 Convertible 3LT
My 1969 fuel gauge has stopped working. The needle stays on full and does not move.  The gauge or sending unit bad?  Any suggestions. Thanks
Be the first to like this post
Sign In to Like this post
SPONSOR AD:: (Our Sponsors help support Vette Registry)

Re: fuel gauge

Posted: 3/17/17 7:42pmMessage 2 of 5
Profile Pic
Lifetime Member
Moderator
Send PM
Duncanville, TX - USA
Joined: 11/8/2003
Posts: 22714
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
First do a little test. At the fuel tank, there is a brown/tan wire on the sending unit. Take that connector loose, and with the key on, engine off, ground it(use a short piece of wire, or a small screwdriver as a jumper) to the frame. If the fuel gauge goes to "Empty", the wiring, and the gauge itself are good, and your problem is with the sending unit.
 If it does not go to Empty, then you have either a break in the wiring from the sender to the gauge, or there is an issue with the gauge itself. Thumbs Up

Joel Adams
C3VR Lifetime Member #56    

My Link


(click for Texas-sized view!)
             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Be the first to like this post
Sign In to Like this post

Re: fuel gauge

Posted: 3/19/17 3:11amMessage 3 of 5
G
Former Member
Send PM
, United Kingdom
Joined: 10/6/2015
Posts: 83
Vette(s): 1970 convertible in red 350
Correct me if I'm wrong but I think you've got it back to front, if the sensor lead is grounded it will go to full not empty. If it reads full all the time then it's either a short in the sensor lead or in the tank sender unit.
If you disconnect the lead at the sender then switch on the ignition the gauge should drop to empty, if it does its the tank sender if it stays full it could be the gauge or the sensor lead, if you check resistance of the lead to the chassis and it's very low you'll need to get to the back of the gauge and disconnect it there and check again to narrow down where the problem lies.
Graham
Be the first to like this post
Sign In to Like this post

Re: fuel gauge

Posted: 3/24/17 11:52amMessage 4 of 5
Profile Pic
Standard Member
Send PM
Long Valley, NJ - USA
Joined: 3/21/2007
Posts: 297
Vette(s): 1972 454 Coupe, 4 speed, Targa Blue with blue interior, luggage rack 2019 Grand Sport Coupe, M7, Ceramic Matrix Gray with gray interior
With apologies to our sponsors, ,Wilcox has a very good diagnostic procedure on their site!

Mario

Be the first to like this post
Sign In to Like this post

Re: fuel gauge

Posted: 3/31/17 9:13amMessage 5 of 5
r
Free Member
Send PM
Suffolk, VA - USA
Joined: 7/24/2012
Posts: 140
Vette(s): 2009 Convertible 3LT
Thanks I will look at the Wilcox site and try the tests that were mentioned by the other members  
Be the first to like this post
Sign In to Like this post
Share:

in Forum: C3 HVAC, Fuel, Emissions, and Exhaust


Sponsored Content