Topic: Fuel Guage Diagnostics
in Forum: C3 Electrical
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Former Member
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Mint Hill, NC - USA
Joined: 10/25/2007
Posts: 123
Vette(s): 1982 White Corvette, dark blue leather interior, 70,000 miles
While troubleshooting my fuel guage I ran across a good couple of articles I thought I would share.
jbs82vette 2008-10-22 04:34:28
I know this is for 63 to 67 but it has some good info that pertains to c3's.
Here is a nice website for more info
Jon
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Lifetime MemberThanx Jon!
corvette440hp
Looks like a good site, thanks Jon.
Larry
The difference between men and boys is the cost of their toys!!
Jon, what was wrong with your fuel gauge?
On my last tripwhen I filled up the gauge would not go to full stopped at like 3/4. I thought maybe the float was stuck. But then I did that bonzi run at the Glen and that for sure should have un stuck it. It will go down from this point. I'm baffeled?
Thanks, 
eboFormer Member
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Mint Hill, NC - USA
Joined: 10/25/2007
Posts: 123
Vette(s): 1982 White Corvette, dark blue leather interior, 70,000 miles
I'm pretty sure the coil in the guage went bad. My old guage would not go up past 1/4 tank when the thank was full. I first tested the printed circuit for the guage cluster for breaks, corrosion and any loose connections. Everything checked out good. I bench tested the guage with a known good sending unit. I took the pink wire from the sending unit to the guage then put 12vdc + and - to the guage. I then moved the float arm on the sending unit to full and down to empty and the guage would not go past 1/4 full going up but would go to E when the arm was at the bottom. When I bought the new guage I did the same test and the new guage checked out perfectly. I had guage problems back in May but it turned out to be the tank bladder had bulged out and was keeping my sender float from going down past half a tank. Needless to say I replaced the tank and that fixed the problem.
Jon
in Forum: C3 Electrical
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