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GS - 2nd Gen (1998-2005) Discussion about the second generation GS300, GS400 and GS430 (1998 - 2005)

Help!! Vacuum hoses/lines?

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Old Sep 2, 2021 | 05:43 PM
  #1  
dhuyzee281's Avatar
dhuyzee281
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Default Help!! Vacuum hoses/lines?

So I’ve recently went ahead and installed a T70 turbo (apologize if I’m not mechanically correct with the terminology). Now I’m not sure where to connect all these vacuum hoses…I’ve attached pictures to let you know what I’m referring to. Thanks in advance for any help y’all can provide me!!!

Not sure where this connects to? If I had to guess it would connect to my intake once I put it on?


Now this one I’m completely lost….😞


Now for my BOV, where would I connect that hose to?
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Old Sep 3, 2021 | 06:10 AM
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The first one you are showing is just the air inlet for the EVAP system. It goes to the canister setup in the back if you follow it. I just put a breather filter on mine, or you can just leave it open, not too big a deal since you aren't too concerned about emissions. But to keep the system in tact and free of unfiltered air clogging it up over time. Put some sort of filter on it.

The second one is your PCV inlet. But you need to do some research on catch cans and particularly the way PCV works under boost because this one is important. I see a lot of people just put breathers on and it's not correct. You now need a setup that allows for PCV under normal conditions and under boost which flows the opposite direction. Special catch can setups are available and hook up the proper way.

The third is simple. BOV's just go directly to manifold vacuum. That means past the throttle and into the actual intake manifold.

How did you route your waste-gate?
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