Walbro GSS340 fuel pump. Check valve?

[Wheelin66bronco]

Now that I've got my bronco running/driving, I've got a few things to tidy up. One is the fuel pump.
It loses prime after sitting a few minutes. I'm guessing the Walbro 255 pump (which I was duped on Amazon) is not genuine and doesn't have a check valve in it. Do the "real" Walbro GSS340 pumps have a check valve? There's very little technical info on the walbro website.
Or, can the fuel pressure regulator act as a check valve? I've heard both yes, and no.
My fuel system is as follows. Knockoff GSS340 pump in the tank, modified to fit the oem pickup. Fuel goes directly to one rail, cross-over up front, out the back of the other rail to the regulator. Return off the bottom of the regulator.
If I were to install a inline check valve, what is the best location for it? I was thinking in the tank, as close to the pump as possible but that will be difficult. I could do right outside the tank, but I'd have to buy expensive ford push-lock fuel ends to adapt to a check valve. OEM ford check valve with the push lock fittings built in is expensive ($200).

 

[rattle_snake]

yes

 

[Wheelin66bronco]

yes

Yes the real Walbro has a built in check valve, or yes the regulator can act as a check valve? If the regulator, what configuration does it need to be in to work as one, because right now it's not.

 

[welndmn]

Are you sure it is not the injectors leaking?
I had an e2000 I had to put a check valve on, so it happens.

 

[rattle_snake]

Yes the real Walbro has a built in check valve, or yes the regulator can act as a check valve? If the regulator, what configuration does it need to be in to work as one, because right now it's not.

most in tank pumps have a check valve. the Walbro's do. Regulators typically do not. The fuel rail should hold pressure for awhile (hours to days)

 

[Wheelin66bronco]

Are you sure it is not the injectors leaking?
I had an e2000 I had to put a check valve on, so it happens.

Sure hope not, brand new. But anything's possible. No smoke or raw fuel smell on startup. I can hear the fuel hitting the rail when I prime the pump so I'm pretty sure it's leaking back to the tank. I'm gonna go with a genuine Walbro pump first. Shoulda sent the knockoff back as soon as it arrived, but I'll have a spare at least.

 

[Wheelin66bronco]

Well, the fuel pump was at the bottom of my priority list of things to work on. The pump quit on my way to work Friday, roughly 3000 miles on it. Now off to get a genuine Walbro pump.