When we start using add-on performance enhancers, you need to understand how they make more power, and still keep the PCM happy. Most of the time, they make sure the PCM sees what it wants to. In the case of the Edge, the PCM is lied to, which results in more fuel, boost, and adjusted timing, but the PCM is oblivious to it. Your boost may actually be over what is acceptible by the PCM, but it doesn't see it, so it's happy. With OEM programming and no add-on enhancer (like Edge), an overboost can mean several things, some wrong, some not. This is also the problem with damaged engines. If the PCM can't see a problem, it has no way to counter an issue that can cause damage. This is why it is so important to have gages with mods so we can be the watchers. Remember, the PCM assumes all the equipment is still OEM.