Low fuel pressure

[Mathew21]

This is my first engine swap. I have a 1966 Chevy C10 with a 5.3 from a 05' Silverado. I have only 36 lbs of fuel at the schrader valve.

I installed a under the bed Boyd welding tank that came with a Aeromotive Stealth 340 Fuel Pump. I ran 10 gauge for the power wire and 10 gauge for the ground wire.

I ran 5/16 fuel line from the tank to a LS1 Fuel Filter/Fuel Regulator from Speedway motors. The return line from the regulator to the tank is also 5/16. The fuel line from the Regulator to the fuel rail is 3/8.

My first mistake I made was I reversed return and feed fuel lines at the regulator. After I figured out I barely had any fuel pressure I switched them around. Now I only have 36 lbs. Is it possible I damaged the regulator?

Any advice you can offer this newbie sure would appreciate it.

[BR3W CITY]

Which fuel rail is on the truck (returnless truck, flex fuel truck, return style truck).

I'd grab another regulator and swap it in since its the easiest and most-immediate solution.

How are you measuring your fuel pressure?

[Mathew21]

Originally Posted by BR3W CITY

Which fuel rail is on the truck (returnless truck, flex fuel truck, return style truck).

I'd grab another regulator and swap it in since its the easiest and most-immediate solution.

How are you measuring your fuel pressure?

Returnless truck. I had a friend bring over his fuel-pressure test gauge set. He hooked the gauge up to the schrader valve.

I did order a new regulator earlier today hoping it that would be it.

Thanks for the reply. I learned a lot from your build thread before I started my build.

[Mathew21]

Fixed I replaced the Fuel Filter/Fuel Regulator with a new Wix brand one it fired right up.