boost gauge

i put a new boost gauge in the car auto meter.
it does not seem to to stay at any psi it jumps around all the time is this normal ?.Jumps around 3-4 psi even in high gear .

if you used just a boost guage once the turbo hits boost it should stay put and not flucuate psi. If you got one with a vacuum side as well it might move up and down as you press the gas since vacuum lowers when you get closer to WOT. If you have boost flucuation check the connection for the line that it is air tight and ou dnt have any boost leaks or brkoen IC hoses.

Sounds like the vac line to the back of the guage could be kinked too. If it is the little plastic one that comes with it, they are real easy to kink and get an inacurate reading with.