Quote Originally Posted by 1project2many View Post
Yes! Maybe this helps explain some things.

Rolly, the different chip ID's you see, $31, $0E, and $0D, are identifiers for where the specific variables are arranged within the calibration. When you load an XDF, Tunerpro is instructed to treat each variable in each defined location a certain way. There will be a variable (or table) name and a conversion factor so the binary value represents a number we understand. If a .bin with the wrong mask ID is loaded then Tunerpro does not do any sanity checking. It will treat the variables as it has been instructed, giving each the predefined name and displaying the value according to the conversion formula. It could treat temperature as timing, throttle values as O2 parameters, or fuel injector size as rpm. For many this issue never comes up but unfortunately the 7427 and sister pcm's share three commonly used mask files.
Man, cannot thank you enough for your education on chip ID's and XDF files. Did not give this aspect any thought. Now it is burned in my memory. Must keep in mind that XDF files decode the binary values. Is the mask ID available in the .bin even if the .bin and XDF files are not properly associated? Any other tips like this that can be passed on would be greatly appreciated.

Rolly