I have been having a huge problem with my 95 GST. Some time after I sold my GReddy BOV, and reinstalled the cheesy stock bov the engine, ive been having over spooling problems with the turbo. When driving on the highway cruising (not accelerating or decelerating) the turbo is at full boost and I am only giving it less than half throttle. It also is extremely jumpy and has trouble maintaining one speed. Is it possible that the change in BOV have an effect like this on my car, or is it more likely something unrelated? By the way, does anyone know a good place to bring a 4G63 for service/modifications that I cannot do myself in the boston area? Thanks.

 

Research Boost creep.