1957 fuel leak scare | Ford Thunderbird forum club group 1955-2005 models
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1957 fuel leak scare

  • Thread starter Thread starter vernz
  • Start date Start date
vernz
Reaction score
14
Thunderbird Year
1957
A few days ago I started my D code 312 1957 Thunderbird and it ran very poorly. I backed it out of the garage and it stalled. It would not restart so I decided it was flooded and held the accelerator pedal to the floor to start it. It did start but again ran very poorly, then I smelled raw gas. I turned her off and checked under the hood and to my horror found the engine covered with gas and drips and small puddles of gas under the car! I mopped up all the gas I could get to and went right into the house and ordered a Halon fire extinguisher for the car. I probably came as close as I ever want to come to having a car fire.

The carburetor was wet with gas around the rear float section. I was able to tighten all 8 screws (front and back float sections) between 1/2 and 1 1/2 turns without over tightening them. On restart and about 15 miles of driving the car ran great and there were no further leaks. Here's my question. I had never before tried starting the car with the pedal floored. Is there any reason that could have caused the fuel leak problem or was it the loose carburetor screws? BTW, this is a professionally rebuilt carburetor that i put on the car about a year ago.

Thanks, Vern

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Last edited by a moderator:
No, flooring the gas pedal will not result in gas flooding out of the carb. While it may have been loose float bowl screws, I think it more likely that the needle valve associated with one of the floats got stuck and the float bowl overflowed and gas went out the vent. A stuck needle valve can happen because of a bit of crud getting into the needle valve, and it can then clear so the float is operating normally. Recommend an inline gas filter before the carb if you don't have one already.
 
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