Hi my name is Dan, from San Bernardino. My 95 Deville, 4.9 all of a sudden began running rough while driving. Can maintain speed at any level okay but has a mild stutter, not only when accelerating. While parked w/o load it seems to idle and accelerate fine. Wondered if someone can identify this as a fuel problem (regulator, filter etc) or an electrical (O2 sensor, main brain etc) problem....or at least point me in the right direction?? Vehicle is all stock, 95,000 mi. I have owned it since it was at 60,000 and it has been flawless. Thanks