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Turbo problem

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89 DAYTONA Shelby 2.5 none intercooled turbo. car set for about 14 years got it running a few weeks ago and the turbo seams to be stuck in hi boost.shows 3 psi of boost at idle and you can hear it spooling up..At 3500 RPM's she is around 10 psi of boost. I think the wastgate is stuck but not sure.any ideals or anyone have this problem befor?
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