I have a 77 el Camino classic. Why can I only pump a gallon of gas into it before it starts overflowing?

Asked by Nov 06, 2015 at 01:25 AM about the 1977 Chevrolet El Camino

Question type: Maintenance & Repair

I'm having trouble filling the gas tank. It
takes 1gal and  then fills up the neck. Then
the pump automatically shuts off. I know its
almost empty. Thinking its like an evap
clog? But I'm unsure in where it would be

1 Answer

86,205

The gas tank vent is plugged or kinked. If it has a evap can then it is likely plugged up.

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