Vacuum on boost gauge

[tayl51601]

Hey, i installed a boost gauge over the weekend and it reads the boost perfectly fine but the needle never drops into the vacuum part.

I connected the hose up to the intake just before the intake manifold to see if that would work and it does with the reading of boost but not vacuum.
Does it matter where i get the air pressure reading from, or should it even be going into the vacuum part at all??

[Riced_Civic]

thats y i find electronic boost gauges better

[BluEG]

t piece it on a vacuum line after the throttle body (intake mani) if you want it to
read vacuum/boost.

[tayl51601]

t piece it on a vacuum line after the throttle body (intake mani) if you want it to
read vacuum/boost.

That would explain it lol i got mine on the intake pipe before the mani
cheers

[DLO01]

Thats exactly right. Source must be after Throttle Body. :thumbsup: