ive just connect my fpr vacume up, now am i right in say that it will be a max pressure at idle and the decrease through the revs or the other way round, just did it out of bordem and to see if would stop overfueling(only does it slightly), taken it for a test drive and doest really seem any different.
heres my diy vacume connection
also had to move the fpr too as it was knocking and ****ing me off, sits quite sung in the corner
without vacuum the regulator will supply full whack, whatever its max rating is. say 3 bar. with the vacuum connected it subtracts whatever the manifold vacuum is from the above max. so say 1 bar vacuum at idle, makes 2 bar fuel pressure. as the throttle opens vacuum decreases, pressure rises.