Ok. We got my brother's 88 turbo 2 and we had to take out the s4 short block and put an s5 in, all the wiring harness manifolds etc ( everything but the rotor/housings) are s4.



Anywho, he has a vortech fpr and the fuel lines were already hooked up but the vacuum hoses were disconnected and I was wondering where to put it. And also the little fpr box by the intake. His ecu has a fcd in it.



His intake manifold didn't come with an air control valve doohicky on the lower part of the intake /rotor housing manifold it's capped off with a piece of steal. Otherwise i'd hook up the little fpr (not vortech ) to that. To sum up my questions



1) what do i hook up the vortech fpr vacuum line to



2) what do i hook up the little oem fpr vacuum line to



3) and what of the secondary fuel rail's little vacuum line male end that has nothing connected to it at the moment.



Anyone who responds to this frickin kicks ass!! https://www.nopistons.com/forums/pub...1047683894.gif

So you have 2 fuel pressure regulators? How are they hooked up?

The fpr just needs a vacuun source that see psi/vac... So anywhere past the tb.

Well, I have the boost guage running from a t in between the intake manifold and the bov, I can T in both fpr's into that line. but what of the fuel rail's?



1) On the underside of the throttle body there's a vacuum line that runs from one end ( the oil metering side of the tb ) underneath to the other end and has a one way doohicky spliced into the line, but where that goes right next to it is a fitting for another vacuum line and i'm not sure what goes in there.



2) On the secondary fuel rail there is also a little fuel pressure regulator actuator with a nipple for a vacuum line and what should go in there?



I'm bored, I'll draw a diagram of what i'm working with on paintbrush.