I have just bought a boost gauge for my 2002 STI but am having difficulties finding where i should take the feed from. I have tried the pipe that comes from the DV but at idle i am getting a negative reading on the gauge and there is no adjustment on the gauge to 'set' the boost gauge needle.

Am i getting the feed from the right place ??

Anyone have any ideas !!??

 

Not sure if its the right place,but you should get a negative reading at idle,I think my STI starts to register positive boost at about 2k rpm

 

What reading to you get at idle mate ?

 

Its a Defi gauge and it reads in bar.On idle it reads 400 but blipping the throttle makes the gauge read zero.Your gauge will probably read differently if it isn't a Defi but it will show vacuum(a reading below zero on the gauge) when idling .Mine starts reading above zero at about 2k and peaks at about 1.3 bar which is about 20 psi.

 

Mine reads negative 10 on idle and yes tee-off at the dump valve is ok.