After installing a PC3, or after the TPS recall, you'll want to reset your PC3's baseline Throttle Position. One setting is the Zero-Percent Throttle, a baseline. This important setting tells your PC3 where to begin its duties. There is also an on-screen training session on the Dynojet website. Its hard to find so there is a link to that training website in the Popular Mods topic (see the very top of the Technical forum).