.cax question

[mowton]

First I will say that I am not that familiar with the.cax process and will study it tonight but would like an answer to what will probably be a stupid question.....can you identify a .cax file in a tune/os file which you pull from a vehicle? If so how? The reason I ask, we suspect there is one in there and would like to remove it.

In the mean-time, we are writting over the PCM with a GM fresh OS/cal via Tech II.

Thanks and be gentle :-)

Ed M

[statesman]

The .cax file does not end up "in the tune". The .cax file simply gives you access to adjust some parameter which efilive hasn't given you access to.

A good example is the cax file B9021 in the Gen3's, which allows us to modify the Minimum Transient Pulsewidth. HPT has that parameter available as "Min Fuel Milligrams", but Efilive does not give you that parameter so you need the cax file to get access to it.

[mowton]

The .cax file does not end up "in the tune". The .cax file simply gives you access to adjust some parameter which efilive hasn't given you access to.

A good example is the cax file B9021 in the Gen3's, which allows us to modify the Minimum Transient Pulsewidth. HPT has that parameter available as "Min Fuel Milligrams", but Efilive does not give you that parameter so you need the cax file to get access to it.

Thank you for the response, I understand now. So there is no traceable evidence that any of these hidden tables have been altered? Also, if you suspect this, you can erradicate it with a rewrite of the calibration only?

Thx,

Ed M

[joecar]

Thank you for the response, I understand now. So there is no traceable evidence that any of these hidden tables have been altered? Also, if you suspect this, you can erradicate it with a rewrite of the calibration only?

Thx,

Ed MIf you have the cax installed (copied) for that OS in your EFILive V7 software, then when you open that parameter and compare it to stock, you will see if it has been changed.

If you don't have the cax for that OS then you will not be able to tell if that parameter has been changed.

A cal-only flash should rewrite it...