i have a 2010 cobalt and it has been pushing about high 15lbs and now it wont get over 13. and inlet air is about 107 now. it usually stays about 90 to 95. and i was wondering if i might have a boost leak. idk what these things are suppose to boost up too. theres nothing done to it all stock right now

 

im having a simalar problem... mines a little worse my boost is usually around 21 and it wont get over 3 now. had it to two different dealerships the past six weeks they cant figure it out.

 

usually when it is hot you will boost less cause the air is more dense
and when its cold you tend to spike more