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My truck has a studdering problem. It doesn't happen all the time, seems to happen more when the truck has been driven a lot in one day, and it seems to happen more at low RPM's. With the clutch pushed, if I press down on the gas the RPM's drop drastically and the engine studders like it's going to die but it never does. The same happens when shifting gears. If I slam on the gas it works through the studdering and the RPM's jump up like they're suppose too.
I've replaced the fuel filter, Crank Angle Sensor, and the DPRE Sensor in the EGR System. I've also dumped Fuel Injector Cleaner into the gas tank the past couple fill-ups. Nothing seems to work. My next guess is the fuel pump or possibly a short in the Ignition Wires.