bad turbo or bad guage

[Hammerhead]

(03-10-2018 )flonly Wrote:  thanks rawze it is a glow shift installed at mr haggs.So you dont think there would be any reason the tubo itlelf would cause the guage to do that.My main concern is the 3900.00 turbo

My Glow Shift boost gauge does the same thing sometimes, only at 10psi and below.
I don't think they use highest of quality mechanisms in their gauges. Either the spring is weak, or the pin path connecting the movement to the bourdon tube link isn't real smooth causing it to hang in the low pressure area.