question about not running secondary o2 sensor

petah · Post by **petah** » Wed Jul 18, 2007 3:18 pm

need our hondata expert opinion. would it be okay to unplug the secondary o2 sensor and leave the sensor off the car and tape up the connector on the car so it doesn't corrode? (i'll be disabling obd2 in kpro)

this megan test pipe with resonator looks like it'll damage the secondary o2 sensor... insulation will probably burn up and kill the sensor.

Post by **Spunkster** » Wed Jul 18, 2007 4:47 pm

If the secondary burns, then i would be more worried about the primary sensor. Yes you can do what you have proposed.

petah · Post by **petah** » Wed Jul 18, 2007 5:54 pm

as usual, thank you for the help!

petah · Post by **petah** » Sun Jul 22, 2007 1:26 pm

got a question again...

my long term fuel trim seems to be at 0 at all times since i took the secondary o2 sensor off and disabled obd2 ... is this normal?

secondary o2 sensor is at 4.08 or 4.10v at all times (i guess that is normal since the sensor is not plugged in).

datalog is attached with .kdl format but needs to be renamed to .zip format and unzips to about 70mb.

Post by **Spunkster** » Mon Jul 23, 2007 10:20 am

The secondary sensor and OBD2 have nothing to do with fuel trim. The datalog you have uploaded is corrupted and will not open. Post y our calibration and a short datalog.

petah · Post by **petah** » Mon Jul 23, 2007 12:41 pm

you will need to rename the extension from .kdl to .zip then unzip it (after you unzip the name should be b.kdl) the datalog unzips to 75mb and has ~1 hour worth of logging to show that long term fuel trim does not change even though shorterm fuel trim changes from 0 to 10 to -1, etc.

interesting... i was going through a few people's datalogs and seems like if obd2 is disabled long term fuel trim is set to 0 at all times.

I've included a shorter version of the datalog as .kdl here.

edit: i'll post my calibration when i get home tonight.

Post by **Spunkster** » Mon Jul 23, 2007 2:10 pm

only post datalogs that are a few minutes in length at most. We will not attempt to open and find problems in an hour or 2 long datalog file.

petah · Post by **petah** » Mon Jul 23, 2007 2:14 pm

just attached calibration

5 minute datalog was attached to my previous post datalog.kdl is the attachment.

Post by **Spunkster** » Mon Jul 23, 2007 4:46 pm

I stand corrected. There is no long term fuel trim with OBD2 switched off.

petah · Post by **petah** » Tue Jul 24, 2007 7:57 am

wasn't trying to prove you or anyone wrong .. was just curious as usual.

thanks for the help!!!