1999 dodge durango changed tps , still sputtering what else can it be, also changed fuel pump and injec. clean

while in idle or at low speeds it sputters like lack of fuel . once above 35 - 40 mph sputter stops . after about 10-15 min. of driving problem goes away until it sits for awhile . i%26#039;ve changed the fuel pump ,had the injectors cleaned, changed gas stations, and just replaced the throttle position sensor don%26#039;t know what else to change HELP PLEASE!!|||my answer is try to check it out first on auto repair shop....,