Gas Gauge problems
Thread Starter
Advanced
Joined: Nov 2006
Posts: 54
Likes: 0
From: Lavonia GA
Gas Gauge problems
OK, I think I have tried everything...Gauge dies when gets to 3/4 of a tank of fuel. I tried to clean with techron and when that did not work, I then I replaced the right side pump. I problem is at around 3/4 of a tank, the gauge dies..... then when I run it for a while, it works fine. This is the only time is goes to empty. Any suggestion??? Please help.....out of ideas.....this is in my C5 1998.......
Pro
Joined: Jul 2008
Posts: 564
Likes: 1
From: Moyock NC
Mine does the same thing I have tried Techron with the same results as you. I have seen others suggest Sea foam or something called BBK (i think) but I haven't tried them. If you do find a fix please post it up 
Thread Starter
Advanced
Joined: Nov 2006
Posts: 54
Likes: 0
From: Lavonia GA
I will and you do the same. the new right fuel pump cost hurt, and it did not fix the problem. If you need one, let me know, as I have the one I took out, that was good, and another used one that is working also. I made the mistake and got a new one and it did the same thing. OUCH!!!
Melting Slicks
Joined: Feb 2007
Posts: 3,266
Likes: 8
From: Indian Rocks Beach FL
St. Jude Donor '08-'09-'10
You MAY have a firmware problem. If that's the case you can go to the dealer and get the firmware update performed. Be advised if you have a custom tune you will lose it as the dealer must reflash the computer.
For a list of updates available for your car go here:
http://tis2web.service.gm.com/tis2web
For a list of updates available for your car go here:
http://tis2web.service.gm.com/tis2web
Thread Starter
Advanced
Joined: Nov 2006
Posts: 54
Likes: 0
From: Lavonia GA
Thanks, I think you are on to something. When I got the car, the dealership had to put a new computer in it. It has done it ever since I have had it. I will pull the number off the site, and go to the dealership and talk to them. We were talking today, that it seems to be somewhere else, and not the sending units. Thanks and will let you know....
Cruising
Joined: Nov 2009
Posts: 14
Likes: 0
From: austin TX
I have this exact same problem, it started about 2 weeks ago on a trip between Dallas and Austin, all of a sudden my low fuel light comes on and had recently filled up, freaked me out, hoped it wasn't accurate so I stopped to feel up and it would only hold 4 bucks or so, so that was good... apparently there are known issues with the sending units, but any insight would be appreciated. thx...
Cruising
Joined: Nov 2009
Posts: 14
Likes: 0
From: austin TX
haven't pulled my codes yet. I'm not really that worried about it because it only goes to empty for about 30 miles and then it wakes back up... I'm going to throw some techron in there and see what happens..
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
Safety Car
Joined: Jun 2004
Posts: 4,983
Likes: 391
From: Stoney Creek Ontario
when mine was still under warranty, took it to the stealership with the fuel guage problem, they showed on the work order that all they did was add a can of Techron.... I've had the problem since, and added another can which sorted it out - I add a can every few months now...
