I have a 2000 tt and I installed a greddy profec b spec 2 controller. I have an aftermarket dv and cai. I cannot find the right settings to maintain a high boost setting. The boost keeps fluctuating down to even 6 psi. I have tried almost everything as far as settings go- linking the new solenoid with the n57, by itself, everything. Someone told me that the controllers won't work with 1.8's because of the computer. If there is a chip that will allow me to use a controller please let me know. Or if anyone has any suggestions.......