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Home >> Subaru >> 1991 >> XT Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Turbocharger Trouble Shooting >> High Boost Pressure

High Boost Pressure

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If turbocharger fails, excessive boost pressures can cause engine knock and overheating. Check wastegate operation, electrical circuits between wastegate duty solenoid and ECU and ECU problems.