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Originally Posted by Citoriplus
OK, everyone says you can't save a "stock" map, right?
But if the only thing a SERT can do is make percentage changes from whatever map is installed at the time, like a stock map, why can't you just save a map that has NO changes. One with ZERO's in all the blocks. Wouldn't that be the same thing as saving a "stock" map?
Or would reinstalling a saved map like that just make no changes to whatever map happens to be in there at the time?
I think I'm confusing myself now.
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The SERT program writes complete new calibratiion tables to the ECM. It does not make changes to the ECM data, it re-writes the data completely when you re-program the ECM.
To be ready to re-program the ECM, you pick a canned map from the list of SERT calibration maps (or start with a previously stored map on your computer). Based on the tuning data obtained from a dyno, O2 sensor kit, or SOTP, you (or your tuner) makes changes to the map stored on your computer. When you are happy with the revision, you download the new map to the ECM, try it out, and re-tune again if needed. Your starting point for the next reflash is the version of the map that is saved on your computer. If you lose your last saved map from your computer drive, or don't get the latest version from your tuner, you have to start all over from an earlier version of a map saved on your computer.
The SERT software does not incrementally change the ECM's programming tables, it re-writes them completely. The incremental changes are made to the version of the map saved on your computer.
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