cf3 rpm sensor
after 5 years and 45k miles with my spider, it finally done what all the bmw drivers think alfa's do everyday and broke down on me.
when slowing down for a sharp corner the engine cut completly and would not restart. a quick read of the ecu error codes tells me this:
Failed Component Code: RPM sensor
Warning Lamp Status: Warning Lamp Illuminated
Fault Test State: Test not complete for this Error.
Fault Code Storage State: Error Present at time of request
Event Count: 40 count
Environmental Condition One: Engine Speed: 0 rpm
Environmental Condition Two: Relative Load: 18.75 %
Environmental Condition Three: Engine Coolant Temperature: 91.5 °C
Environmental Condition Four: Air Temperature: 23.25 °C
Environmental Condition Five: Throttle Valve Angle: 20.39 °
Environmental Condition Six: Battery Voltage: 11.42 volts
cleared errors and it's back up and running, but, i have set up a graph to log the rpm and it shows about 10 dips in the rpm in the mile back to my house which would explain the 40 event count, but why would it not cut out the 40 times before and why do i have to reset the ecu when it does cut out if it gets the same fault 40 times before.
also the battery voltage is 11.42 . this a bit low and could this be contributing to the problem if the battery is a bit duff?
does anyone know what connector the rpm sensor is in the engine bay so i can give it a wee clean just in case?