Hey guys, quick question. The vacuum line that goes to the FPR(honda motor), where should that go to. If it went to the intake manifold, would the pressure drop when it started boosting. I know when the car was NA and you rev it up the pressure went up, but that is when there was vacuum, now what about if there is pressure going to the FPR, would it go down.

 

vaccuum to the regulator brings the pressure down so no vaccuum or or a positive pressure should either raise the fuel pressure, not lower it. If you have doubts just pull the line off and plug it