2001 Subaru Legacy

Engine Performance problem
2001 Subaru Legacy 4 cyl Four Wheel Drive Automatic 90000 miles

My car has a bh5 twinturbo engine and while driving it even on accel. It doesnt have the back pressure that turbo cars have even when turbo has kicked in atually you cant tell the difference. Ive done engine diagnostics and no findings were found im thinking of doing adjustments on the waste gate valve do you think its advisable?
May 18, 2010.

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