HI I have been having a problem since I got my ecu chipped with the giac program and installed a boost gauge I will hit full boost then instead of it holding it will start dropping. I have checked most vac lines my vac at idle is 19 and I just replaced the N75 valve and it seemed to hold pressure better and more constant but still wont hold it at full boost @ WOT. If anyone has idea's please let me know. I want to start by saying I ve been working on car and used many forums so I know what the rules and how it works and I do use the search button a lot if I need to figure something out but for something it's easier putting a post up.


Thanks