I got a '96 5.0L 4x4 5spd and when I first start it up and the motor is cold it seems to 'bog' down or stutter under normal acceleration. Once the motor warms up (a mile or 2) it runs just fine. If I park it at the store and go inside it seems to run fine after that, its just in the morning when it has been sitting a long time, and there is no check engine light on. The plugs wires and distr. is all about 2 years old.