Hey guys I have an 07 cobalt ss/sc bone stock. When i purchased the car everything was great, always boosted about 13 (ish) psi, and everything was dandy. Now i'd say about 75% of the time i drive my car the boost wont go over 3-4 psi no matter what gear/throttle position. The other 25% it works fine? im very confused it seems to me as the computer is limiting it for some reason, if anyone has any ideas please let me know!

 

check your ic pump to see if it is working and look for vaccum leaks and check the boost bypass solenoid and also use the search button and post in the correct section ie problems and service section this is a problem that has been coverd many different times