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Home >> Mercedes Benz >> 1986 >> 560SL >> Repair and Diagnosis >> Engine Performance >> System >> Cis-E System >> Operation >> Fuel Enrichment >> Maximum Engine Speed
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Maximum Engine Speed

ECU senses engine speed based on impulses from "TD" terminal of the ignition switching unit. Engine speed is limited by changing current to the differential pressure regulator from ECU. Lower chamber pressure is increased to system pressure and fuel supply to injection valves is interrupted.

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