Originally Posted by nanmer
I know this thread is old but i have the same problem. Only thing is i have a mechanical fuel pump. Is that what you have as well. I didnt think one would need a fuel pressure regulator with a mechanical fuel pump.
Temporarily mount a 0-15 mechanical fuel pressure gauge on the grille-work of the cowl, directly in front of the windshield and monitor the pressure through the glass as you drive. Use copper tubing for a temporary, cheap install to plumb between the gauge and the carburetor inlet point.