1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
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17,289 Posts
Too Rich. Definitely sounds like float. At this age a float should be considered part of a carburetor rebuild.
That or a piece of debris is trapped in the float needle and seat. The fuel filter should catch the trash unless the inside of the fuel line is flaking rust into the fuel stream or the fuel pump is coming apart inside.
If this originally had a 3-port fuel filter that returned a portion of fuel back to the tank and it is replaced with a 2-port fuel filter, the fuel pressure will be way too high.
Plastic floats become porous and absorb fuel after a few years.
Brass floats can get a hole and take in fuel. If the sunk brass float sits and dries, you won't hear a tell-tale splashing inside when you shake it next to your ear. If they rest on the bottom of a dry aluminum float bowl for a spell they can have a hole corrode into the bottom of them.
A heavy float will do exactly as you describe.
That or a piece of debris is trapped in the float needle and seat. The fuel filter should catch the trash unless the inside of the fuel line is flaking rust into the fuel stream or the fuel pump is coming apart inside.
If this originally had a 3-port fuel filter that returned a portion of fuel back to the tank and it is replaced with a 2-port fuel filter, the fuel pressure will be way too high.
Plastic floats become porous and absorb fuel after a few years.
Brass floats can get a hole and take in fuel. If the sunk brass float sits and dries, you won't hear a tell-tale splashing inside when you shake it next to your ear. If they rest on the bottom of a dry aluminum float bowl for a spell they can have a hole corrode into the bottom of them.
A heavy float will do exactly as you describe.