Boost gauge..for the 3rd time

BigD-a3tq

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after hitting problems with the wiring i finally got round to connecting the boost hose today, i have t'eed off of the FPR but im not getting a reading at all?

if i disconnect the hose from the back of the gauge i am getting a 'suck' effect rather than a 'blow'
(probably not the best words to describe this but most accurate :yum:!)
can anyone confirm if this is right?

It is a stack mechanical gauge and the thing that is worrying me is that i took it to bits to paint the back of the dial red and i fear ive probably ****** it in the process!

Any ideas chaps?
 
Sounds right really, mine also shows vacuum on idle. Aslong as it shows boost when you put you foot down its all good:)
 
When conected and the car is at idle there should be vacume.
Mine shows near 20 psi negative boost ( vacume ) this my well differ car to car but... you get the idea
 
id be taking apart the gauge again if your getting
vacuum.