disable rear O2's

[Hammink Performance]

Hi Guys,

Up untill now I have never tuned a car myself, just used the flashscan V2 and efi live software to do data logging etc, and send those files over to a tuner who did the tuning for me.

I do however get the question very often if I cant turn of the check engine light in cars that have only had an exhaust upgrade. To me that sounds like a simple adjustment, but I don't know.

How would I be able to do this myself?

Thanks in advance

[joecar]

You disable all the DTC's for the rear O2's (table C6001) and you disable the MIL for the same (C6002).

[Hammink Performance]

Thank you for the info.

How do I get to the tables? Connect the car to my laptop -> start efi live tune tool, and than?

You disable all the DTC's for the rear O2's (table C6001) and you disable the MIL for the same (C6002).

[LastCall]

Thank you for the info.

How do I get to the tables? Connect the car to my laptop -> start efi live tune tool, and than?

You will need to read the ECM or edit a copy of the tune if you have already have a copy of it. Go to Engine Diagnostics, there are two sections. One for DTC Enablers and another for DTC MILs. Then do a cal-flash only of the tune.

[joecar]

Yes, correct, connect laptop->V2->ECM, open V7 tunetool, go Flash->Read PCM Calibration... when it has finished reading, go File->Save As and save it with a filename.

Then make your edits...

Then go File->Save As and you should see the filename with _nnnn appended (where nnnn is an incrementing number), and save it with this new filename.

Then Go Flash->Program PCM Calibration (i.e. a cal-only flash) (if it requires a VIN license follow what it says to assign one and then repeat Flash->Program PCM Calibration)... wait for it to finish, then follow the instruction regarding the ignition key (turn off for 15 seconds).

[joecar]

What year/vehicle are you doing...?

[Hammink Performance]

Thank you guys for that info!! I will definitely try this!

What year/vehicle are you doing...?

Corvette C6 Z06 (year 2007)

[Hammink Performance]

Ok I think I got it, I found both tables, and also how to set everything with O2 to "X not reported" and "no mil"

Quetion I have though is: do I also disable all the ones labeled HO2S?

Also I am unable to save the file, is it because I have to purchase this? http://www.efilive.com/licenses/tuni...tuning-option#
After I bought this I will only need VIN licenses in the future correct?

[joecar]

Ok I think I got it, I found both tables, and also how to set everything with O2 to "X not reported" and "no mil"

Actually, it is sufficient to set them in C6001 to Not-Reported", and there is no need to edit C6002.

Question I have though is: do I also disable all the ones labeled HO2S?

Yes, any that mention "rear" O2 or HO2.

Also I am unable to save the file, is it because I have to purchase this? http://www.efilive.com/licenses/tuni...tuning-option#
After I bought this I will only need VIN licenses in the future correct?

V7 tunetool should let you save the file, post a screenshot showing why it won't save...

do you have a FlashScan V2 with GM option...? If you do, then each time you flash a new ECM (previously unflashed by your V2) it requires a VIN license.

doesn't your V2 already have GM option (how else have you done E38 logging otherwise)...?

[Hammink Performance]

Yeah I can log ecm's no problem, and I can also flash them after buying the vin license.