Was driving home pretty hard today (14 psi and about 120 mph) on an empty highway and boosting fine up to 14 psi. After a few minutes I look down at my boost gauge at WOT and see that it's fluctuating around 10 psi very rapidly . No smoke or strange noises and the car pulls fine up until that point. I just had my vacuum/boost hoses replaced two months ago, and all other hoses were checked then and were fine. Any ideas? thanks.

-Matt

 

Im having the same problem too. I also just had the lines replaced. Sometimes at WOT when the 2nd turbo kicks in....the rpms go waaay up....and it feels like its not going anywhere. Weird how it only does it every once in awhile.