03 9-3 2.0t with stutter at high boost.

[Black9-3]

Hello,

I have a 03 9-3 2.0t that just started to get a stutter at high boost. When the stock turbo gauge goes into the red/orange during hard acceleration the engine stutters. As long as I keep it out of the red/orange it runs and accelerates just fine. Then the other day while I was duplicating the problem for a friend this time after it stuttered it set off the check engine light with the code for a misfire on cylinder 3. I pulled the battery cable to clear the code and took it for a test drive. The engine didn't stutter or the engine light come on till I accelerated hard again and the gauge went into the red/orange. I don't think that the misfire in cylinder 3 is the cause of the problem, but the after affect of whatever is causing the stutter. I think it might be a waste gate issue, the boost control valve, or maybe a vacuum leak??? I'm not really sure so any information or help is greatly appreciated!

Thanks in advance!

[Saaber95er]

Check to see if the wastegate rod is still connected to the Turbo theres a clip that holds it sometimes it breaks disconnecting the wastegate from the turbo. The bypass valve can be checked with a vacuum/compression tool.