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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.......
 

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The Bosch Motronic ECU will be fighting the aftermarket boost controller for contol of the boost!A tap (leak) in the boost line to the wastegate will be perceived as a boost leak by the ECU and boost will be lowered to try and maintain the correct boost levels mapped out in the ECU.
The Bosch Motronic ECU control systems in Audis are very sophisticated compared to most Jap cars and cant be fooled so easily!
Get a good quality chip if you want more power.
 
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