I have a stock sti 2(seems stock anyway) and mainly on gear change I get a very quick boost spike to 1.45 and then it settles down to .9 for the remainder. Its only happens for a split second, is this something I should worry about? And what do you think could be causing this? I get no fuel cut either.
Thanks for any replies.

 

What has been changed on the car?

 

do you feel the extra boost or are you getting it from a boost gauge?