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Thread: ECU Where to get Misfire code ?

  1. #1
    Potential Tuner
    Join Date
    Mar 2018
    Posts
    8

    ECU Where to get Misfire code ?

    Hi All;

    Example:
    Ecu know AFR from o2 sensor
    Ecu know knock from knock sensor etc..


    ECU Which sensor does it use for misfire ? How does it know?


    Car: 2009 Opel GT Rodster (Saturn SKY Redline 2.0 LNF)

  2. #2
    Tuner
    Join Date
    Jul 2018
    Location
    Texas
    Posts
    53
    Crankshaft sensor - RPM

  3. #3
    Tuner
    Join Date
    Jul 2018
    Location
    Texas
    Posts
    53
    ECM compares speed of crankshaft from one cylinder firing to the next. If cylinder misses, crankshaft slows down. Then it identifies which cylinder misfired.