Topic: Losing Gas
in Forum: C3 Fuel, Emission Control, and Exhaust Systems
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Bladenboro, NC - USA
Joined: 1/22/2006
Posts: 1058
Vette(s): 1972 conv., sunfire yellow, blk interior, blk vinyl and convertible top. Off frame restoration with American Speed 383 stroker engine producing 500hp plus a 200hp NOS system. MSD ignition. Hooker super competition headers with chambered exhaust.
Our car club attended a cruise-in about 30 miles away this weekend and when we got there, the guy behind me said I was losing gas everytime I left a red light or turned a corner.
When I looked at the back of the car, there was little specs of gas all over both back bumpers. I had just filled the tank before we left. In the 60 mile round trip, I either burned or lost a half tank of gas. The tank is new. How can I find where I'm losing the gas?
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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
Use a match? 
Sounds like either the fuel filler neck is leaking, or one of the return lines on the top/sides of the tank are leaking. If you fill the car full, have someone shake it side-to-side vigorously and look to see if any fuel comes out of the fittings on the top/sides of the tank, or from the filler neck area.
Sounds like either the fuel filler neck is leaking, or one of the return lines on the top/sides of the tank are leaking. If you fill the car full, have someone shake it side-to-side vigorously and look to see if any fuel comes out of the fittings on the top/sides of the tank, or from the filler neck area.
Joel Adams
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Former Member
Send PM
Bladenboro, NC - USA
Joined: 1/22/2006
Posts: 1058
Vette(s): 1972 conv., sunfire yellow, blk interior, blk vinyl and convertible top. Off frame restoration with American Speed 383 stroker engine producing 500hp plus a 200hp NOS system. MSD ignition. Hooker super competition headers with chambered exhaust.
"Use a match" 
Will a cigarette lighter work just as well?
Will a cigarette lighter work just as well? Mine leaked around the filler neck, gasket had deteriorated. It had strong gas smell when riding with full tank. May be fitting or hose if gasket was changed with new tank.
Check this too.....my 72 always smelled like gas after installed a new tank, lines etc.
Duhhhh......the gas cap was leaking......the paper seal was missing from under the cap. The 72 has a sealed cap. other years are different.
Bruce
Bruce
72 Coupe L48 4sp
Custom Blue/Silver/Pearl 
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in Forum: C3 Fuel, Emission Control, and Exhaust Systems
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