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Sounds like symptoms of bad timing, and perhaps a bad TPS.
I will suggest this.
Replace your CPS. it is cheap, and easy to do. Then, unhook your negative battery cables, for about 20 minutes turn your key to the run position to help drain off all capacitors, then turn the key switch off. Reconnect your negative cables and turn your key to the run position, but do not start the truck. Slowly depress the throttle pedal, to the floor, then slowly return it to the idle position. Shut the key off.
Now start the truck, and try running it. What you have done, is a soft reset of the throttle position sensor. If it clears up your problem, then you know that a TPS is in your future. You can do a hard recalibration of the TPS, but I am not going to get into that here.