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lost boost after valve cleaning...

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So in a nutshell... Was boosting 17.5psi midrange falling to 14.2ish at redline. Went to dealer to get valves cleaned and left and with same tune now 17.5 midrange 12.49 at redline??? and it's consistant. My boost req and boost actual is like 3psi off now where is was good before. Did a boost leak test on just the mani and cold pressure pipe and all is good? Could cleaning the valves had made car not hold boost as well?? Cant figure it out. Wastegate after PID 5k rpm and up is 57% so wastegates are closed.. Any thoughts guys??

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