Fuel gauge issue
Thread Starter
Racer
Joined: Dec 2009
Posts: 382
Likes: 8
From: Wellington
Fuel gauge issue
I have just rebuilt my 76 and now my fuel gauge at rest sits just clockwise past the full end, then when the car is running it sits at the right level for the fuel, but as I slow down it rises up to the full end again. Any ideas what this could be?
Cheers
Kev
Cheers
Kev
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
You need to do the initial test first so we can try to help.
Ign key to ON ,
remove tan wire from tank sender (what did the needle do ? )
now ground the tan wire to a solid ground ( what did the needle do ? )
Ign key to ON ,
remove tan wire from tank sender (what did the needle do ? )
now ground the tan wire to a solid ground ( what did the needle do ? )
Thread Starter
Racer
Joined: Dec 2009
Posts: 382
Likes: 8
From: Wellington
Thread Starter
Racer
Joined: Dec 2009
Posts: 382
Likes: 8
From: Wellington
Just to make things stranger, I have worked out that when I put my foot on the brake pedal it makes the fuel needle rise way way past F. This is not about the motion either, it does it when the car is stopped and when the engin is off!
What on earth is the relationship between the fuel needle and the brake pedal?
Kev
What on earth is the relationship between the fuel needle and the brake pedal?
Kev
Le Mans Master
Joined: Aug 2006
Posts: 7,423
Likes: 1,558
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
The wire where?
The wire is at and under the tank.
For post 6 ...Roger... will have to help you with that question.
For post 6 ...Roger... will have to help you with that question.
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
The wire is going to be connected at the sender on the tank, I think on your 76 it's on top of the tank , you should be able to go in through the gas lid , push the rubber aside and expose the wire.
(Petes 74 will be on the bottom , 78s and newer are for sure on top and I'm pretty sure 75-76 are on top also.)
post 6- sounds like you have grounding problem-sounds as if the tank is grounding through the rear light grounds. Turn one of your signals on and see if the tank responds to the flashing.
Check the tank ground lead , it will be next to the sender wire.
(Petes 74 will be on the bottom , 78s and newer are for sure on top and I'm pretty sure 75-76 are on top also.)
post 6- sounds like you have grounding problem-sounds as if the tank is grounding through the rear light grounds. Turn one of your signals on and see if the tank responds to the flashing.
Check the tank ground lead , it will be next to the sender wire.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Thread Starter
Racer
Joined: Dec 2009
Posts: 382
Likes: 8
From: Wellington
I have nailed this one! It turns out that when the panel shop replaced the antenna base for me when the rear bumper was off, they took off the earth strap and when they put the new one on they did not put the earth lead from the fuel tank sender back on!
All sorted now, thanks to your advice above. Thanks guys.
Kev
All sorted now, thanks to your advice above. Thanks guys.
Kev
