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Check engine light on. Yikes! S90-V90 1997

posted by  david hunter on  Wed Jan 12 12:20 CST 2005
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last visit: Mon Jun 30 22:10 CST 2014
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Makes perfect sense, therefore basis of ignition timing is the engine speed sensor. It would seem that a faulty signal from the cam postion sensor would not set a misfire code but rather a faulty signal from the engine speed sensor would. As I understand it a misfire code (from a specific cylinder or multiple cylinders) is set by the ECU detecting a speed inconsistancy on any single revolution of the crank. Therefore this would seem to most likely be detected from the engine speed sensor.
Do you agree?
Any history of that sensor failing
--
David Hunter






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