This has been a problem ever since I had a newer tranny installed, and of course the place that installed it decided to sell and bounce after being there for about ten years. Anyway... I am having an issue with the car sputtering at high boost. When I hold below 15psi, it runs fine. But I would much rather be able to run it at its full potential of 22 or 23 psi. When i get above 15psi, the car sputters and seems to lose all boost on and off. I have been at college, so I went easy on it for a month or two. Did have the wastegate adjusted for an additional turn by the previous owner that is a buddy of mine, but it didn't seem to fix the issue.

Think the wastegate needs to be adjusted further? Or any ideas of another possible problem that could cause this? And it does seem worse in fourth gear, which makes sense, because that's when im getting the most power.


Thanks.

 

I know a guy that has a stuck n75, but he gets no boost at all.