Originally Posted by elig0nzal3z
Update recieved my jb4 usb cord today and downloaded the software and update the future use D to 99... and wow it made a huge difference the rattle is for the most part gone completely if the car is parked and i rev it to about 2,500 and let off you can kind of here it a little but its pretty low the car feels the same tho for the most part i didn't notice much of a difference.
Search for robc1976's (i think) post about wastegate adjustment on the front turbo, it's apparently doable. FUD=99 on the JB4 non-ISO board is a temporary fix because it's limited in it's capability. I would recommend adjusting the wastegate actuator rods, if possible, or upgrade to an ISO board which allows adjustment from 0-100.