fuel pressure regulator

[Liteace]

Got here a Pug 106, the FPR is on the tank (not in it, on it) its only got a fuel feed to the engine, the return is all done at the back via T-pieces and shit on the filter, on the inlet manifold its got vac feed to servo, crankcase breather vac (vented through rocker cover) and another t-piece that connects the EVAP pipe to it as well and thats it

So you've got manifold > purge valve > canister > FRP (connected into EVAP pipe via a t-piece) Tank

So Where T.F does the FPR get it vacuum from as the purge valve is idle when the engine is idling ???

[Larue]

It don't need vacuum. It's adjusting fuel pressure by spring in it.

[aidyk]

is it not just a continuous fuel pressure of around 2.5 bar or so.? doesnt need vacumn to function properly. as far as im aware.

[Liteace]

Thanks for the info, I was super confused (as I always am) thinking how the ~~~~ does this work, so they have just connected the vac feed on the FPR to evap line just incase the diaphragm pops, I'll check part number, looks like its the wrong FPR then