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Unusual Boost Behavior


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05 legacy GT w/ intake,turbo inlet, exhaust, in any given gear, will feel slow up to 3k rpm, then from 3-5k feel slightly less slow, and only from 5-6.5kRPM does the car feel like it did before i ran into said problem. i have not had a pro/custom tune yet, the turbo has 4k miles and the problem began shortly after installation of the turbo inlet. I have checked thoroughly for boost leaks, sparks and coils are only a thousand miles in, and i feel lost. Is it possible my car is in desperate need of a tune or am i running circles around something simpler?

 

 

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My problem was that the wastegate was hung open. So the boost was bleeding off. Had to disconnect the downpipe to free it up. Another symptom was a rattle sound at idle. I thought it was a heat shield but it was actually the wastegate puck rattling.
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