Re: Hesitation and back fire

Posted by TxGoat On 2023/8/23 20:00:44

Check your crankcase oil for any sign of gasoline contamination.

If you are using an electric fuel pump to pump fuel through the stock fuel pump, there is a risk of the electric pump forcing gasoline into the crankcase if the stock pump diaphragm fails.

There is also an increased risk of fire due to presurized gasoline leaking near the exhaust header.

There should be no need of an electric pump if the stock pump is working as it should.

It would be possible to connect the electric pump to the fuel line between the stock pump and the carburetor, which would prevent the electric pump from being able to force fuel into the crank case. The electric pump shyould be connected in such a way that the stock pupm does not have to draw fuel through the electric pump, and vice-versa.

I've driven old cars all my life, with many of them having been sourced from junk yards and back lots and pastures. I have never found it necessary to add an electric fuel pump to any vehicle.