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Home >> Mercedes Benz >> 1992 >> 300CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 12 (Engine Controls - Theory & Operation) >> Computerized Engine Controls >> LH-SFI System >> Engine RPM Limitation

Engine RPM Limitation

WARNING: This page is about a different car, the 1992 Mercedes-Benz 400E. However, it is still accessible from the selected car via links, so may be relevant.

To protect engine, fuel injection is turned off when engine speed exceeds 6250-6350 for 10 seconds. After fuel injection is turned off, continuous engine speed is limited to 6950-6050 RPM. Engine speed limit is reset to 6250-6350 RPM after engine speed drops to less than 5500 RPM.

When gear selector is in "P", "N" or "R", engine speed is limited to 5600 RPM. Any interruption in vehicle speed signal will limit engine speed to 5600 RPM.

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