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Topic: Gas Gauge Bounces.

in Forum: C3 Electrical

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Gas Gauge Bounces.

Posted: 9/28/12 8:52pm Message 1 of 4
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tinbender
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edgwood, MD - USA
Joined: 11/1/2007
Posts: 736
Vette(s): 1975 convertible,with the hard top and power streering.it a 350 L48 with auto trans. the color is light blue.
Took the car out to put gas in it and afterwards,the gauge needle started to jump from full to about quarter marks on the gauge. Anyone know how or what I can do for this.......any help on this will be helpful. Thanks Rick


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Re: Gas Gauge Bounces.

Posted: 9/29/12 8:00am Message 2 of 4
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Adams' Apple
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
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
Were you having any issue with the gauge before this one time of putting fuel in? If not, I would suspect the sending unit in the tank. It may have a small break in the winding of the rheostat that can cause this sort of thing.
A loose connection/ground at the tank unit can also cause that.



Joel Adams
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Re: Gas Gauge Bounces.

Posted: 9/29/12 8:15am Message 3 of 4
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The Rook
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Pittsburgh, PA - USA
Joined: 12/4/2002
Posts: 600
Vette(s): 1979 L-82, 3 spd auto, car was originally Lt. Beige currently painted Sportsman Red, Doeskin leather interior, 103,000 miles......
Mine does the same thing. I changed the sending unit and it still bounces....Rumor is that it may be a bad resistor on the back of the gauge itself. This is slated to be a winter project for me.
 
 



Re: Gas Gauge Bounces.

Posted: 9/29/12 6:42pm Message 4 of 4
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Sarge81
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WEST SENECA, NY - USA
Joined: 12/3/2001
Posts: 2379
Vette(s): 1981 Blue Ice Met. w/pearl ghost flames TKO500 5speed. LS1 Swap 3.45 Dana 44.
My '81 had a bouncy fuel gauge issue years ago. After discussion with Ken Styer "kstyer" I went ahead and changed out the fuel gauge and the problem was solved in my case.

The fuel gauge is designed to act like a damper. Otherwise it would bounce around constantly as the fuel sloshes around the tank.

So it's one of two things. Good luck!

Sarge




GEN III 5.7L "LS6" Engine swap
TKO500 5 spd.
3.54 Dana 44
'69 "N11" Sidepipes
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in Forum: C3 Electrical


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