Put my boost/vaccum gauge in yesterday just wondering if someone could expalin to me if my reading is correct.
I have a green bar on my gauge for top and bottom of vaccum gauge(just before the boost mesuremnt) my reading is on IDLE half way should it not be up the top of the vaccum gauge ?
thanks and sorry if this is a stoopid question

scrappy

 

If you're saying your gauge shows a vacuum on idle, that's correct. You'll the get the same anytime your turbo is providing no boost.

Richard

 

what I mean is when the engine is not running say the gauge is on the top marker when it is on IDLE it goes down the the middle if you get what I mean if anyone has a pic of a gauge that would be cool
cheers

TOP OF GAUGE

MIDDLE

BOTTOM OF GAUGE

 

When its not running it should read 0 pressure, so it will be in the middle. Start the car and the engine pulls a vacuum so it will go down. On boost it will go past the idle position (middle) and go up ie posotive pressure.

MB