Hi Guys

I fired up my secondary fuel pump for  the first time today and was met with what I didn’t expect.
Instead of seeing a blip in the fuel pressure, I had a 10psi increase and high current draw from the pump which blew its 10amp fuse.
I’ll up the fuse as its too low me thinks.

I used an old fuel regulator I had on a rail. It was of a Toyota 4AGE engine of about 135hp.
Seems like its not able to bypass enough fuel with both pumps running.

I think I need to install a higher power adjustable regulator.
What experience do you guys have with turning both pumps on simultaneously?

I’m putting a pressure switch in the circuit to turn on the backup pump if the fuel pressure drops below a preset level.

Appreciate your thoughts and experience.

Steve Izett
Genesis 4 port EC3 EM3 RD1C in a Glasair Super II RG still nearly finished!