Different reading between Rear O2 & Com Port for LC-1
#1
Evolving Member
Thread Starter
Different reading between Rear O2 & Com Port for LC-1
I have done the rear O2 hack to allow EvoScan to log my LC-1 wideband via ECU ADC input. However, I notice there is a difference between the data logged via ECU ADC and the COM Port method.
Yes, there is a difference even if I were to log just these 2 parameters alone without the rest which may slow down EvoScan.
My observation shows most of the time, the COM port data is leaner than the ECU ADC's data,
Any idea which would be the more accurate data to base my tuning on?
Edit: I forgot to add that the rear O2 ADC data is matching the figures on my LC-1 gauge.
Yes, there is a difference even if I were to log just these 2 parameters alone without the rest which may slow down EvoScan.
My observation shows most of the time, the COM port data is leaner than the ECU ADC's data,
Any idea which would be the more accurate data to base my tuning on?
Edit: I forgot to add that the rear O2 ADC data is matching the figures on my LC-1 gauge.
Last edited by RS200Z; Jul 2, 2011 at 06:02 AM.
#3
Evolving Member
Thread Starter
Are you saying the COM (Serial) port data is more accurate compared to the rear O2 ADC data?
My current formula is x*0.0147+7.35 which is for the default 0-5v (7.35 AFR-22.39 AFR) and it matches the output on my LC-1 guage.
My current formula is x*0.0147+7.35 which is for the default 0-5v (7.35 AFR-22.39 AFR) and it matches the output on my LC-1 guage.
#4
EvoM Guru
iTrader: (6)
that formula should be correct assuming the defaults in lmprogrammer
what I do to verify the ECU/LC1 is not being affected by ground offsets, is in LMProgrammer set the LC1 to output 0v then log the voltage in the ECU/ADC
then set it to 1v, and relog
2v, log
3v, log
etc
if your logged voltages match the settings you used in LMProgrammer then you have a good connection...
what I do to verify the ECU/LC1 is not being affected by ground offsets, is in LMProgrammer set the LC1 to output 0v then log the voltage in the ECU/ADC
then set it to 1v, and relog
2v, log
3v, log
etc
if your logged voltages match the settings you used in LMProgrammer then you have a good connection...
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