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im confused about your setup. are you running a haltech boost controller and a tubosmart valve at the same time? in the op you say that it still overboosts when you take out the haltech boost controller but if you take out the turbosmart valve does it still overboost on the wastegate psi?
overboosting on wastegate psi would indicate a different set of problems vs anything being used to control/change boost from wastegate psi
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