If we were to start by trying to perform many different tests on every car starting with compression testing, moving on to ignitions specific tests and followed by fuel tests, we would never make any money on any diagnostic job at all. What if we took a different approach? An approach that consists of viewing a handful of PID’s on our scan tool to determine in which system listed above the problem originates. That is exactly what this program does. We won’t overwhelm you with a bunch of background system information we will instead show you a common sense approach with diagnostic shortcuts to get to the bottom of this type of issue as efficiently as possible.