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Home >> BMW >> 1989 >> 535i Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> System/Component Tests >> Idle Control System >> Notes
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Idle Control System: Notes

CAUTION: If a problem occurs affecting idle/idle mixture, do not adjust tamper-proof idle by-pass screw. Check all components which could cause problem. If all components work properly and idle/idle mixture problem persists, idle control valve and MCU must be replaced.