I replaced alot of the sensors to get rid of that bogging out. It was the pressure regulator. I removed the emission stuff and unbolted the coil braket and set it aside.took the hood latch bolts out so I could lay in there with out getting stabed.3 bolts in the regulator. 1 is hard to get to. I grinded down the allen wrench so I could get it.I dont know if this is whats wrong with your truck but I am happy it fixed mine Remember to relive the fuel pressure and disconect the negative battery terminal before you start.Update It was a blown head gasket
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