i have a 89 hf crx with a b16 swap dat i did . do i really need all the vacuum lines that it has or i just need the map sensor?????? cause i bought the skunk 2 manifold and it has one vacuum line plus the throttle body has two so i dont know if i really need to put vacuum lines on those holes or it can just be the map sensor and live the other holes open

 

he one on the manifold is prob for the fuel pressure , and the 2 on the TB are 1 for map sensor and the other is for the charcoal canister( f you didnt take it out)

 

the manifold has two holes one in front for the regulator and one in the rear