Re: Electric Fuel Pumps

Posted by BigKev On 2013/12/3 14:30:50

The question is are you going to use it as a "primer" or vapor lock helper, or as a backup in the event the mechanical fails.

If as primer/vapor lock helper, then the "series method" is perfectly valid, as you are not running the motor off of the electric full time, just occasionally in those situations.

I use mine to "prime" the system when the car has been sitting for a few weeks, and that makes the car start much faster. Once the car starts, I turn it off the electric pump.

On mine, when I turn on the pump with the car not running, I can hear the pump come on, and the sound it makes (tone) changes as the line pressurises. If that tone doesn't change, then that means I am either out of full (not pumping at all), or that fuel is being pumped unrestricted to somewhere. Which should never be the case with the car not running, unless you have a blown mechanical diaphragm.