Ok this is what I have
walbro intank
bored out fuel rail
aeromotive fpr(bypass)
when It idles, the pressure is at 42psi and even if I turn the screw, pressure won't go up... How come? Do I have to set it at high voltage? And how would I do that?
You need to replace the fuel pump relay with a jumper to run it in constant high volt mode. There should be a write up somewhere about it. Pretty easy mod mate
All you do is take 2 spade connectors, join them too about 3 cm of decent wire then brige two of the connectors in the fuel pump relay socket. I had it on my car but i took the walbro out cos it was friggan noisey. I think it was bottom left to top right in the socket. Not 100% though. was a while ago.