EcuTek ProECU 
Tuning Overview Guide
v1.0
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To open a ROM file, select 'Open ROM File…' from the 'File' menu, and select the ROM file that you wish to use: 
Re-opening a ROM File
After a ROM file has been opened once, its filename is remembered for later. This allows the file to be quickly re-opened from the 'Reopen ROM File' submenu
This submenu will hold a maximum of ten (10) previously opened files. This can be very helpful in making new files quickly by using data from ROM files that you have previously created.
Once a ROM file has been selected and opened, the ROM editor window will be displayed.
NOTE: Windows 7 will also show the last opened ROMs in the taskbar: 
ROM Structure
A single ROM file is presented as a number of maps. These maps contain the data that the ECU uses to choose values for engine parameters such as ignition timing, fuelling and rev limiting. The different types of map within each ECU ROM file are described below:
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As confidence is gained with the software, and the tuner wishes to investigate more advanced maps, the user level of the software may be changed as shown below. Simply put, the higher the user level selected, the larger the number of maps that are displayed.
Note that the number of maps displayed only changes on ROMs that are opened after changing the user level. Views of currently open ROM files will not change until the ROM file is closed and then re-opened. 
Map Types
Map Interpolation
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Like 2D Maps consist of a table of values. However, 3D maps are different because they may have any number of rows and columns. This is because the output value of a 3D maps is based on two inputs rather than one. A good example of a 3D maps is the high octane ignition map. The ignition timing used is based on engine RPM and also on engine load 
Scale Data
The input values of a 3D map are known as scale data. A 3D map has both an X and a Y scale. The ECU uses the X & Y scales to determine from which row and column intersections a data value will be retrieved.
Typically the scales are engine load across the top left to right and RPM at the side from top to bottom.
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The output values of a 2D map are known as the map data. This is the right row of values (no shading).
Example:
The Scale Data values are required so the ECU can choose the correct Map Data. So at 1600 RPM we can see the Boost Limit is 1.35 bar. 
Data Values (1D Maps)
These are the simplest of maps. They contain 1 or more fixed values that the ECU uses. A good example of this is the Rev Limit map. This map consists of a single data value at which the ECU will cut the fuel injectors. 
Viewing Map Data
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