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Home >> Mazda >> 1990 >> 626 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Air Induction Systems >> Turbocharger OVERBOOST Warning

Turbocharger OVERBOOST Warning

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Start engine and run at 2000 RPM. Lift air cleaner upper case and push measuring plate completely open. Warning buzzer should sound and engine speed should drop or engine should stall.