fuel pressure regulator

[Kingbob]

what exactly does the fuel pressure regulator do on a 885i please
because there is conflicting info on the net
thanks bob

[Kingbob]

anyone ?

[PeteH]

I`m at a loss to how it all works...thought mine was fooked so bought a new one and the problem persisted, it was nowt to do with the regulator, but if you need one to try out my old ones sitting in the kitchen...

[Bixxer Bob]

It controls the pressure of fuel in the injector rail.  The injectors are calibrated to deliver a measured amount of fuel based on a specific pressure.  Too high pressure and it will be rich, too low, weak or not run, but see my post on your other thread.