I have a 98 1500 with the 5.9l. It starts fine and will move but when I try to accelerate like normal the engine feels like it is starving for fuel and won't pick up rpm's. Had a problem with the plug wires a little while ago so replaced wires, plugs, cap, and rotor. Everything was running fine and now this. It isn't vibrating like I lost a cylinder, just won't accelerate. Any ideas? Maybe TPS?

Ok got in it today and it sounds weak. I pull out on the road and floor it and it acts like it is only running on 4 cylinders, but there are no vibrations. Is there away to check the Throttle Position Sensor?