Yep, your turbo could be seized up. Remove the intake piping and put your finger inside the turbo to see if you can move the compressor wheel. Spin it, if it spins also check for shaft play.
What does the stock gauge measure then? How would you hook up an aftermarket gauge to get an accurate reading? I just hooked mine to the vacuum tube.shekky said:The stock guage doesn't actually measure boost. Your turbo is done.