9-3 Sedan, Cabrio '04+, Combi, 9-3X Workshop
So I have had this problem for around 8 months now and I'm sick and tired of it. I've spent my fair share of cash trying to fix it with numerous people and nobody has been able to fix it. The car is a 2006 9-3 2.0t Conv.
The problem: When you start up the car there is full boost for about 4-6...