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Getting Started Tuning
Tuning an engine is a fine art, there are many variables at play before you do anything make sure you understand the basic principles of how an engine operates. These basic operating principles will help you better develop a safe tune. That being said, all information located here is to be used as a reference only, I am not responsible for any damage that may occur. This guide will primarily focus on the P59 XDF and its capabilities.
A PCM in the simplest terms is a system that chooses what it does based on lookup tables and sensor inputs. These lookup tables are what you tune, by modifying the lookup tables you are changing how the PCM reacts to changes in the engine's operation. These tables can have two, three, or even four axes, and each axis is based on sensor input. This does not mean that an axis is directly based on sensor input, some of the axes can be calculated, such as cylinder airflow which is measure in g/cyl. The PCM does not rely on single tables for most functions, the PCM can be using multiple tables at once, but you will almost always have a base table and multiple modifier tables, but you can also have tables that control the same thing given different conditions. For example, there are three tables that the PCM can use to determine what gear to shift into at wide-open throttle. Most of the time you can focus on one table to get the results you desire, but keep in mind this is not always the case, and some modifier tables may drastically change the values of the base table.
For many engine swappers, your first goal is to get the engine to run for more than three seconds at a time, or to run at all. VATS or Vehicle Anti-Theft System prevents a vehicle theft from occurring by requiring a special key to enable the fuel injectors. Luckily, this is a very easy system to disable, to do so, open the VATS folder, find the VATS option and enter "2".