The boost pressure on my 1999 9-3 2.0 lpt (with BSR ECU upgrade and Forge recirculating dump valve) has lost boost pressure - down from around 1 bar to about 0.6 bar. The last thing I did before noticing the drop was to flush the injectors and use an oil additive (both Slick 50). Suspecting a vacuum leak, I changed all the pipes I could find. I have now shortened the actuator rod which gives 1 bar of boost which then drops straight off to 0.6. Performance is 25% off what BSR expect. Any ideas?