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Losing Gas

Forum: C3 HVAC, Fuel, Emissions, and Exhaust

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Losing Gas

Posted: 10/25/06 7:35pmMessage 1 of 6
r
Former Member
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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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Losing Gas

Posted: 10/25/06 8:04pmMessage 2 of 6
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 22715
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.

Joel Adams
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Losing Gas

Posted: 10/25/06 8:11pmMessage 3 of 6
r
Former Member
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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.
"Use a match" LOL LOL  Will a cigarette lighter work just as well? LOL
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Losing Gas

Posted: 10/25/06 8:46pmMessage 4 of 6
w
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VENTRESS, LA - USA
Joined: 10/8/2003
Posts: 87
Vette(s): 1971 Blue Roadster, sb400, cam, electronic ignition,10 disc CD changer, 2.5" chambered exhaust, 3.36 rear,tremec 5 speed from Classic Chevy, fiberglass rear spring and vintage air.
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.
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Losing Gas

Posted: 10/27/06 5:30pmMessage 5 of 6
b
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Pasadena, MD - USA
Joined: 6/16/2004
Posts: 315
Vette(s): 72 Coupe L48 4 sp Air Tilt Leather
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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Losing Gas

Posted: 10/27/06 8:38pmMessage 6 of 6
T
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East Hanover, NJ - USA
Joined: 9/25/2004
Posts: 525
Vette(s): '68 Black Conv. Matching 327/300 4 Spd. P/S, P/B, P/W, Tele, A/C
It was the gas cap for me too!
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