CPS Question

Discussion in 'Engine' started by shirleydrive, Mar 21, 2014.

  1. shirleydrive

    shirleydrive Member

    Feb 8, 2013
    E320 w210 1998 61K
    Am aware that the most common symtom of CPS failure is that the engine tends to die at idle ( at lights, junctions etc), usually when the engine is up to operating temperature..
    The CPS's job is to detect a missing tooth on the flywheel. What I have often wondered is why the sensor seems to fail at idle speed rather than, say , 3000rpm?
    Anyone have any ideas?
    Mike W210 E320 63K

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