I have a 06 cobalt ss 2.0 s/c that I am tuning. The tune is spot on 11.8 a/f with 16 psi and then the boost falls to 13 psi around 5600 - 5800 rpm. This happened once before with an 05... same thing. I have the tq management maxed along with the boost tables at 100 %. I have tuned 20 plus other 06 cars with no issues.
Has anyone ever had this happen to them? I looked in the forum and found one related post with no cure, or aleast they never posted it.
Thanks in advance