After I shut my car off gasoline leaks out of the throttle shaft and puddles on the intake manifold. What causes this?
This is usually caused by percolation. Percolation happens when the engine is shut off and the temperature rises so high that fuel boils in the fuel bowls and leaks out of the boosters. There are a couple of things you can do to cure this. Make sure the fuel level is not too high. You can lower the fuel level 1/8" below the sight plug hole if needed. Installing a phenolic heat spacer between the carburetor and the intake or a heat shield can also cure percolation.