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Home >> Sterling >> 1987 >> 825 SL, 2.5 C >> Repair and Diagnosis >> Engine Performance >> System >> Electronic Control System >> Trouble Shooting >> Idle Rpm High When Warm

Idle Rpm High When Warm

Check if PGM-FI light and Red LED light is on. This indicates that back-up system is in operation. Replace ECU with one known to be good and recheck. Check idle controls and air intake system.