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Variable Valve Timing Actuator Position Sensor|Testing and Inspection|Page 1871 > < Variable Valve Timing Actuator|Service and Repair|Page 1867

Cayman (987) F6-2.9L (2009)

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Variable Valve Timing Actuator Position Sensor: Testing and Inspection

Variable Valve Lift Monitoring

System design of variable valve lift at Porsche

Diagnosis via uneven running

In the case of a defective valve lifter, the uneven running of the concerned cylinder rises in comparison to its opposite cylinder. In order to differentiate
this to a misfire, a plausibility check of the lambda controllers under partial load is performed.

schematic overview of the diagnosis:

Variable Valve Timing Actuator Position Sensor|Testing and Inspection|Page 1871 > < Variable Valve Timing Actuator|Service and Repair|Page 1867