![]() ![]() Below is a BAD/DANGEROUS data log – the E-tune customer is NOT following data log instructions. **NOTE** you can see in the log below the wide band AFR (AEM) data is no correct, this is caused because the signal wire has NOT yet been wired to the rear o2 sensor input. Once you have opened the data log the first step to easy review is to “freeze” the top row so that as you scroll through the log you can still see the sensor name/data name in the top row. Opening and reviewing your Cobb AP data log in MS Excel DIY Cobb AP Tune upload and firmware upgrade: Check out our blog for a full write up on how to add a W ide band AFR gauge to EVO X stock ECU/rear o2 sensor input data logging. This replaces the otherwise useless rear o2 sensor data with the VERY important wide band Air Fuel Ratio data. You only need to select 1 WB AFR parameter (to match your wide band o2 gauge/controller) Before you can log your wideband o2 sensor you will need to connect the 0-5v signal from the wide band AFR controller/gauge to the rear o2 sensor input. – Wastegate duty cycle correction applied. WB LC-1 AFR – only supported for PC logging.WB AEM AFR – only supported for PC logging.We highly recommend using the AEM X series AFR gauge for this. Rear 02 sensor Voltage – This is used to log the 0-5 signal from the wideband o2 gauge/controller.Vehicle Speed – Speed reported by vehicle speed sensor.Tip out Transient – A derivative of throttle position during disengagement of the accelerator pedal.Tip in Transient – A derivative of throttle position during engagement of the accelerator pedal.Throttle Angle – The throttle position as determined by the Request Torque tables.Speed Ratio – The ratio of engine RPM to wheel speed.STFT – Short Term Fuel Trim currently being applied.SST Clutch Status – Displays the clutch/de-clutch status.Multiplier – Allowed torque percent for SST. Reported TQ to SST – Torque Reported by the ECU to the TCM for SST actions.RPM – Engine speed in revolutions per minute.– Manifold Air Temperature Sensor output. MAP Calcs – Calculated Load based on MAP sensor calculations.MAF Voltage – Mass air flow sensor output voltage.MAF Calcs – Calculated Load based on MAF sensor calculations.MAF – Mass air flow sensor output in grams per second of air flow by mass.Calc – A blended version of Calculated Load based on MAF/MAP sensor calculations. Load – This is the calculated load used to reference various table look-ups.Learned Knock – A percentage used to determine crossover points between High/Low octane tables.LTFT Used – Long Term Fuel Trim currently being used.LTFT Idle – Long Term Fuel Trim during idle conditions.LTFT Cruise – Long Term Fuel Trim during cruising conditions.A count of three will result in 1° of timing pulled from the ignition map. Knock Sum – An incremental counter based on knock sensor feedback.– Variable intake camshaft advance phasing position (Actual). – Measurement of intake air temperature at the MAF location. Width – Total open time of fuel injector. Duty Cycle – Duty cycle measurement of fuel injector use. Advance – This is the final commanded ignition timing after all correction and adjustments. Gear – Next – Next gear to be used as reported by the TCM.Gear – Current – Current gear as reported by the TCM.– Fine wastegate duty cycle request (Reactive). – Variable exhaust camshaft retard phasing position (Actual). – Coarse wastegate duty cycle request (Passive). Coarse WGDC – Coarse wastegate duty cycle (Passive).– Boost Error (Actual Boost less Target Boost). Boost – Relative Manifold Pressure (Absolute pressure less Barometric pressure).Active Map – The current Switchable Map slot in use.– The actual position of the Accelerator Pedal as measured at your foot. V3 Cobb AccessPort Mitsubishi EVO X and Ralliart Parameters: (log these 12 BOLD parameters for E-tune services, average 7-8hz logging speed. Ensuring all sensors are reading correctly, all fuel trims are within spec and the ECU isn’t trying to pull out any timing is VERY important part of owning any turbo charged car and the EVO X/Ralliart is no different. Taking and reviewing a good data log is the best way to “check up” on the health of your Mitsubishi. The EVO X Cobb V3 AccessPort delivers an easy to use hand held or dash mounted gauge/display with full internal Data Logging capabilities and of course the ability to properly re-map/tune the ECU for any build you can dream up. Learn how to view and review data logs, EVO X Cobb AP.ĭata Log: a recording of engine and or chassis sensor data used to diagnose, tune or trouble shoot an EFI engine, suspension or chassis set up. ![]()
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