Detects knock and misfires by detecting the ionic resistance in the spark plugs, a common source of misfires and performance issues
Due to extremely high engine speeds standard knock detection places very special demands on components and system functions. Standard knock sensors are not capable of delivering adequate enough signals at high engine speeds.
On the S85 engine the spark plugs act as a sensor by detecting the ionic resistance during combustion. The ionic current control unit detects this resistance and "talks" to the DME to adjust fueling and timing to optimize performance. A failed ionic current control unit can cause a limp mode condition or a constant misfire in a specific cylinder. In order to determine the cause of the misfire a diagnosis must be performed first.
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BMW Ionic Current Control Unit - Genuine BMW 13627834713
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- Ionic Current Control Unit
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