my truck keeps wanting to bog down when i hit the gas and it also has a large lack of power. ive been told that it could be my fuel pressure regulator, my fuel pump or my furl filter clogged. i changed my fuel filter and it didnt help. if it was my pump going out on me wouldnt it have gone out by now? its been doing this for 2 weeks and before it started hesitating it would have slow starts where i would have to turn on and off the key a few times to pressurize the fuel system. now it does both.