sorry about that i just misread it. Well with any boost guage that you get that is not an electronic it will always have some error associated with is just because of how its getting its ready. How did you run the boost guage?

 

with a vacuum hose from the gauge to a boost line. I.E., factory boost controller line.

 

http://www.roadraceengineering.com/i...structions.htm

this is where i was told how to and where to run the boost gauge!!!

 

i'm sure its probably setup right, maybe its just a bad guage.