Cat C-15 mxs fuel pressure ?

On ur 2nd fuel filter. The plug has a plastic cap on it. Plug gauge in there. It's to the right.

 

Anyone know what the valve by dipstick pointing down does.

 

Its on the fuel line and open so I would trace where the line runs to.

 

It goes into the pump. But I’m unsure what it’s supposed to do. And whether it’s supposed to be open or closed. Cause I think fuel is staying in my head causing poor power.

 

It is a fuel recirculation setup to warm the cold incoming fuel with the warm return fuel. Just leave the tap shut. They got rid of it after a year or two. I think it was on MBN?s

 

So what’s its current position now

 

The handle is inline with the hose so its in the open position like I mentioned in my post. To shut it turn the handle so it’s perpendicular to the line.

 

Yeah I know but the other one confused me lol.

 

Pretty sure I found the issue. Barometric pressure only reads 12.7 here in Utah it’s supposed to sense 30. Does it need calibrated or replaced u think.

 

Psi or inhg. Make sure both measurments are the same. Ive been screwed on that before