Fuel Pressure Regulator

[bluee36e36]

how and where do you hook up a fuel pressure regulator, on a 93 325is?

[bluee36e36]

anyone?

[jllphan]

Are you merely needing to replace a faulty unit?

I've always read that it is located on the back side of the fuel rail in the engine bay, but I recently replaced mine with an adjustable unit and it was underneath the car (about where your gas pedal is)behind a silverish metal shield that protects it

[bluee36e36]

i'm putting on an adjustable unit also, how would you go about doing it?

[jllphan]

I did that last week.

Which one did you get, the one from bavauto?

And why are you adding an adjustable unit, the only reason I did, was because I have an OBDII engine mated to an OBDI induction system and was starving my engine. If you've not done an engine swap (or something of the like), I can't think of a good reason to add such used

[bluee36e36]

the reason i'm putting an adjustable unit on my car is that i have a straight exhaust and a cold air intake, along with headers. i heard that since i have more air coming in and going out, i need more fuel to keep the air/fuel ratio the same as stock. i also have a dinan chip. so how did you do it?
i asked my local speed show, westminster speed and sound, and they said that it would add about 5-8 horses and make the throtle response better.