Hello I just recently bought a 2009 cobalt ss with a boost problem in hopes of fixing it myself. So far no luck. I've checked for boost leaks... nothing, Installed brand new GMS1 Map sensors and brand new AC delco MAF sensor hasn't helped. Im not throwing any codes either. For the most part im stuck at 8-10 psi, sometimes it'll spike for a few seconds and fall back down to 8 or 10. I've been datalogging on vcm scanner and can't seem to pinpoint the problem. Ill upload my datalog and tune file. If anyone can help at all I would appreciate it soo much! Mods are, Hans racecraft intercooler, ZZP Charpe pipes, Hans Racing exhaust and cold air intake.