When i bought my vectra 1.9cdti it had a boost gauge fitted and im just a bit confused if its working properly or not. The car seems to boost fine with no leaks etc. Heres a picture of it on idle
As you can see it sits around 23 at the bottom numbers and when i put my fut down on full boost it goes up to around 12 on the bottom part of the numbers. It basically never goes below 10 towards zero.
So is my boost gauge working properly and if so how do i read what boost its running