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Discussion Starter #1
The is car is dead nut 3 pounds of boost on dyno then graph leves and all the way to let off. This on a turbosmart pro gate 50mm wastegate with 7 psi spring. I don't hear any . I would think 4psi leak would be heard. I have verified the spring in wastegate.
 

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Discussion Starter #3

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Formerly eades5.0
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Do a visual on the diaphram and a vaccum test on the gate

I also had a similar issue and my valve was sticking, 7yr old gate and TiAL replaced valve/seat no charge.
 
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