What's your pressures with a single walbro 255?
Here's the deal, my pressure with my old prosport gauge was 58 at idle and 64 wot.
I just had some issues With my fuel pressure sender and prosport replaced it and upgraded me to the stepper motor gauge and now it reads 50 at idle and 55-56 wot? At least I think it's the gauges fault for the different readings. I just know noticed this though, may have read that toward the end of the other gauges life, idk
What do yall think?

 

I've got a Walbro 255 and an Autometer electric FP gauge. Mine reads 58 psi at idle 62-64 psi at WOT. I think that's pretty normal. May want to check it with a manual gauge hooked up to the fuel rail???

 

Ya, idk what's the deal with the pump... Thought they either worked or they didn't

 

I've had a Walbro fail on me. I was getting 15 psi. You will know!!!

 

I'll just order another one.. Does anyone know if the gss340, gss341, or gss342 have a check valve? I'm not sure which model mine is but it doesn't have the valve..