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1/24/14 12:07pm - Original Message: '80 gas gauge issue'
vettenut2
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ANSONIA, CT - USA

Vette(s):
1980 Black 5 speed doeskin interior.

Joined: 1/29/2002
Posts: 3
My gauge reads full when it really is at half. When I fill it, it pegs the gauge.. Think this is the sending unit in the tank or a gauge issue?? Any help would be appreciated

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1/24/14 12:48pm - Reply: 'Re: 80 gas gauge issue'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

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

Joined: 11/8/2003
Posts: 19458
 If you can disconnet the wire at the tank, with the key on, the gauge will go to Full. If you GROUND the signal wire, the gauge should go to Empty.
It seems like your gauge will at least MOVE some, correct? That means the wiring is ok. Your problem is going to either be the float is hanging up on the bladder inside the tank, or the sender unit is faulty.

I'll add that it could be a problem with the gauge itself, but the sender unit has caused more issues like this than the gauge.

|UPDATED|1/24/2014 10:48:16 AM (AZT)|/UPDATED|


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Joel Adams
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1/24/14 1:02pm - Reply: 'Re: 80 gas gauge issue'
vettenut2
Former Member
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ANSONIA, CT - USA

Vette(s):
1980 Black 5 speed doeskin interior.

Joined: 1/29/2002
Posts: 3
Thanks for the advice. Now all I need to do is get under the car.. If I need to change the float or sending unit, I'll assume the tank needs to get dropped. With it having a bladder in it, should I look at changing out the entire setup?? The car is garaged and no obvious rust etc on the tank, but it is 34 years old..

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1/24/14 1:15pm - Reply: 'Re: 80 gas gauge issue'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

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

Joined: 11/8/2003
Posts: 19458
I believe the sender unit can be accessed from the TOP on your '80 car. Remove the fuel filler door, and the rubber boot inside, and you'll be able to check the wiring, and pull the sender out of needed. Others here have done that, and may be able to give some time saving tips. Thumbs Up 

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Joel Adams
C3VR Lifetime Member #56    
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(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"
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