Yep, your N/T 4g63 does have a fuel pressure regulator. if you look between the top of your valve cover and the top part of the intake manifold (the part with the letters on it) you will see your fuel rain and injectors. Your regulator is on the drivers-side end of the rail and it should have 2 hoses going to it.

how do i know if it is set right?

It is non-adjustable. You can hook up a gauge to check your base fuel pressure, but it might be cheaper to just find a good/used FPR if you think its bad. On a side note, I've probably got a few out in my garage.

yea it probly would be less money and time consuming to just replace it then doing a pressure test... but how rich is it actually running, is it smokin? (black or greyish)

it white smoke

bstclum said:

it white smoke

Click to expand...

Black smoke = Engine is burning excess fuel (running rich)
Blue smoke = Engine is burning oil
White smoke = Engine is burning coolant