2004 4Runner 2UZ-FE fuel pressure issue

Hey group!

So I was able to figure out my last problem of not getting power to my fuel pump relay but now I am experiencing the following...

1. I'm only getting 19psi out of the brand new fuel pump.

2. As soon as I turn the vehicle off, the fuel pressure bleeds back into the tank immediately which in turn makes for long starts.

I have replaced the following...

Fuel pump
Injectors
Fuel damper

Could my problem be a bad fuel pump regulator?

Any advice would be greatly appreciated!

Thanks!

 

The Regulator is on the pump assembly along with the filter. I have the same problem. Have you found a solution yet? I’m at a loss.

 

https://mechanicbase.com/engine/low-fuel-pressure-symptoms-causes/

One interesting thing I saw in the link above is that the fuel drain might be a bad injector that is stuck open.

You may want to pull plugs to see if you find something.

 

So I believe I have found the culprit. Took the intake manifold off today and found that the intake manifold gasket had been split in half around one of the valves. Going to replace it tonight or tomorrow and see what happens.