When I lightly touch the accelerator pedal the engine dies. It will rev up fine and runs strong when pedal is pressed fully. When driving down the highway, when I just lay my foot on the pedal it jerks. But when I press the pedal more it responds normally. I have replaced plugs, wires, rotor, dist. cap, and have had the distributor module checked. This is my first experience with fuel injection so any help would be great.