All Small Six Plug fouling

[kaden_.adams]

Hey! Recently rebuilt 200, my plugs are getting fouled after about a month of driving, old motor had this same problem. Im wondering, I have an electric fuel pump on the car because the last motor had a wiped out cam lobe for the mechanical one, its a 27gph pump, im wondering if this is the problem? It doesn't have an inline regulator, wondering if too much fuel pressure is pushing past the needle? And help it appreciated!

 

[pmuller9]

Yes, you should have a bypass fuel regulator, and the regulation pressure depends on the carburetor.
Which carburetor are you using?

 

[aussie7mains]

Quite possible, but you should have other symptoms like:- black smoke, excessive fuel consumption. the flow rating of your pump is more than you will ever need, but you might need a pressure regulator. What carby?

 

[kaden_.adams]

It is a holley 1904 I believe, and it is using quite a bit of gas, more than I feel it should be, havent noticed and black smoke though

 

[pmuller9]

It is a holley 1904 I believe, and it is using quite a bit of gas, more than I feel it should be, havent noticed and black smoke though

The Holley 1904 should not have more than 4 psi of fuel pressure to prevent flooding.
You should install a regulator that has a return line back to the fuel tank and a fuel pressure gauge right at the regulator.

Certain electric fuel pumps cannot be dead headed at the carburetor and must have a return line regulator.
Which fuel pump are you running?