For this Tuesday's Tech Tips, we're looking at a Dodge ticket. This customer wanted to learn how to change his Park Throttle Spark table from MAP vs. RPM, to Aircharge vs. RPM. Our book covers GPEC2A computers for the newer 2015 Chrysler models and up. This vehicle, a 2007 Chrysler, uses NGC4. Aircharge vs. MAP, here's the simple difference.