GMC 98 SONOMA"missing"or"surging" during accel-code P0122

My 98 GMC SONOMA 2.2 LITER 4 CYLINDER has been seemingly "missing" or "starving" for about 4 months now. It drives ok then, during acceleration, it seems to "miss" and "surge" the entire vehicle - as though the engine simply isn't getting enough fuel to continue the acceleration process. Also, the CHECK ENGINE light is popping up on occasion giving the P0122 (Throttle Pedal Position Sensor) code. Its also giving the P1626 (Theft Deterrent System Fuel Enable) code as well? I assumed it was either clogged injectors or an old fuel filter so I replaced the filter (which did nothing?) and I added some of that "cleaner" to a full gas tank ... but before I spent the grand on new injectors I was told about this EGR valve thing. Since this is a MUCH cheaper fix I was intrigued as to the validity of this as a solution or is there something completely different I am missing?