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Home >> BMW >> 2012 >> 335i 2D Convertible, Automatic Trans >> Repair and Diagnosis >> General Information >> OEM General Information >> Functional Descriptions - F25 - Cooling System, Engine Performance >> Engine Performance - Functional Description >> Detection of engine speed variations >> Engine speed variations

Engine speed variations

Fig 1: Engine Speed Variations Curve
G09912068Courtesy of BMW OF NORTH AMERICA, INC.
  1. Y axis engine speed
  2. Y axis actuator position feedback
  3. x-axis time
  4. Measured engine speed with excessive fluctuations indicating a sooted intake area.