1. A torque control system for an engine, comprising: a throttle plate having an adjustable throttle position to regulate a first mass air flow into said engine; and a control module that estimates a previous volumetric efficiency of said engine based on a previous manifold absolute pressure (MAP), that determines a current MAP based on said previous volumetric efficiency, that calculates a difference between said current MAP and said previous MAP, that sets a desired MAP equal to said present MAP when said difference is less than a threshold difference and that commands said throttle position based on said desired MAP.