omega_rugal Posted February 2, 2017 Share Posted February 2, 2017 after taking a good read to the Renix EFI manual i noticed that the O2 sensor can be used to get a good idea of how good the combustion is going... do you think i can just unplug the sensor and hook up my own reading device or should i tap the lines in paralell so the ECU doesn`t go mad trying to find the sensor? because tuning the damn reducer by hand is driving me nuts... Link to comment Share on other sites More sharing options...
Blue88Comanche Posted February 3, 2017 Share Posted February 3, 2017 after taking a good read to the Renix EFI manual i noticed that the O2 sensor can be used to get a good idea of how good the combustion is going... do you think i can just unplug the sensor and hook up my own reading device or should i tap the lines in paralell so the ECU doesn`t go mad trying to find the sensor? because tuning the damn reducer by hand is driving me nuts... The ECU used the o2 sensor to adjust the fuel trim, if it is unplugged or in error state, it will default to a pre set fuel trim. So I don't know what you are trying to tune, but if it requires a proper fuel air mix, unplugging the O2 sensor will throw it off. Running in parallel may be the best option. Sent from my iPad using Tapatalk Link to comment Share on other sites More sharing options...
HOrnbrod Posted February 3, 2017 Share Posted February 3, 2017 Get a wide band A/F meter. Link to comment Share on other sites More sharing options...
Tex06 Posted February 3, 2017 Share Posted February 3, 2017 Get a wide band A/F meter.X2. AEM makes the Uego, great quality wide band A/F tracker. Narrow band (like what your ecu uses) O2 sensors move rapidly making it hard to see what your fuel is doing. I happen to have the Uego installed in my MJ, used it to troubleshoot fuel problems I thought I was having. Sent from my SM-G930T using Tapatalk Link to comment Share on other sites More sharing options...
omega_rugal Posted February 3, 2017 Author Share Posted February 3, 2017 i got some wires in parallel witht it going inside the cabin, hooked to a multimeter, if i`m doing things right, then i`m getting a lean lecture (3v-4v), except on idle, in idle goes between 1.5-2 which is "rich", that would explain why to start the engine i need to open the throttle a little bit, as for lean on acceleration... * small backfire *.. yes it`s lean... maybe last time i tune it it was cold, now that is getting warmer need some extra tweaking... anyway proof of concept works, i`m thinking about puting a "lean" "rich" light signal on the dash... bad post Link to comment Share on other sites More sharing options...
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