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C5 Fuel gauge woes.

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Old Apr 16, 2013 | 08:52 AM
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Default C5 Fuel gauge woes.

Hello, I have a 97 vette with a "few" electrical quirks. The task at hand is my fuel gauge. The gauge never reads more than 3/4 of a tank, even directly after topping it off, and will randomly drop to empty with the check gauges indicator immediately coming on. I have been told that this may be a grounding issue (of course being told this after replacing both sensors). Any ideas? Or folks with similar issues? Thanks guys, hope you're all having a good day.

Ps yes I have tried fuel cleaners.
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Old Apr 16, 2013 | 10:03 AM
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I had a similar issue yeturday. Not sure if this helps but how I resolved it, albeit probably temporarily, was checked and cleared all the codes in the DIC. After that everything went back to normal. Crossing fingers it stays that way.
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Old Apr 16, 2013 | 10:05 AM
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search "techron" - you need to buy afew and add to your tank.
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Old Apr 16, 2013 | 11:39 AM
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Already tried. No such luck
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Old Apr 16, 2013 | 12:49 PM
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Tried techron last week. no results.
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Old Apr 16, 2013 | 12:53 PM
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Originally Posted by EvansVette
Tried techron last week. no results.
One dose may not be enough. Until you have done a few tank fulls, you cannot rule it out.
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Old Apr 16, 2013 | 01:33 PM
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I'll try 2 more big bottles and see how it goes. Both sensors have been replaced, and you are def right about the expensive part. If it turns out to be a corroded ground I am going to kick my own ***..
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Old Apr 16, 2013 | 02:15 PM
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Originally Posted by chaase
One dose may not be enough. Until you have done a few tank fulls, you cannot rule it out.
- when mine went out the 1st time I think it was about 3 tankfuls before it worked....now about once per month and I've been good....
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Old Apr 16, 2013 | 02:21 PM
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Haha, I have had the vehicle less than a year and I am wondering why I am still the first going through the "common issues" that I see. I think they just ran the poor girl into the ground...

there there bessy...
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Old Apr 17, 2013 | 07:23 AM
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I literally had a crazy evening yesterday where I have fixed everything but that issue. I hate that I have to wait so long to see if the techron is working, lol.
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Old Apr 17, 2013 | 07:50 AM
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Give the addition of Techron to the gas a bit more of a chance. Sometimes it does take multiple doses to work. If not, you may be looking at replacing the fuel tank sensors like 8VETTE7 mentioned - not a cheap thing to do. Good luck.
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Old Apr 17, 2013 | 08:06 AM
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Dang man.
In under two hours I'll be signing papers for my first vette, 1997 edition.
This isn't looking good! First the steering column issue now this. I'm already going through this with my '01 Chevy truck.
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Old Apr 17, 2013 | 08:15 AM
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Steering column issue is a relatively simple issue unless it is already locked up. One of the vendors here offers a great product that just bypasses the problem. Did the car have any of the other issues that you have seen here?
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Old Apr 17, 2013 | 08:53 AM
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Thanks Evan.
No, not that I'm aware of but I drove it once. Going to sign papers this morning.
It belonged to Ellen's husband who bought it from a coworker who had money problems. Problem fixed but new owner won't resell. Owner dies, sons don't like manuals or chevys so Ellen lists on vettefinder.
Now I'm hearing all about the problems but it's a cash/weekend car for me so I'm okay I guess.
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Old Apr 28, 2013 | 08:53 PM
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Ok, so techron has had no effect. Anyone have any suggestions other than the sensors and techron? lol.
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Old Apr 29, 2013 | 07:24 AM
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Default techron

I had the same problem on my 99 frc, I dont think you are giving the techron enough time it took almost 2 months for mine to clear up. I bought 6 bottles and did one every 2 fillups after about a month and a half I started to see my gas gauge stay where it should
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Old Apr 29, 2013 | 08:16 AM
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I just started running Techron in mine and am hoping it fixes the problem. If not I will drive around with a faulty gauge and just keep putting gas in her. I am not spending the money to fix something that will just brake again.
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