I have a 2003 Saab 9-3T with a standard transmission. In any gear with the engine below 3000 RPM, if I step on the gas and the turbo peaks (while the engine is still below 3000 RPM), the engine sputters. It's like it's hitting a governor. If I let off the gas (letting the turbo spool down off peak) the sputtering goes away. If I downshift and floor it (getting the RPM above 3000) then the problem doesn't surface. How do I fix this?