fuel pressure regulator?

there are two fuel pressure regulators stock on my 1992 teg b18a
or is there? one could be a dampner and the other a regulator, anyway there is one on the return side of the rail and there is another on the supply side of the rail. If you look at the one on the supply side of the rail there is a plastic cover that you can snap off. below this cover is a phillips head screw used to adjust fuel psi. ??? which way do you turn the screw to increase or decrease psi.?:shock:

your looking and playing with the wrong thing. your fuel pressure regulator is at the far right side. the end of the fuel rail. and nunles you rhave aftermarket fpr , you cannot adjust them as far as i know.