Truck will not accelerate correctly

Hello, I have a TK Sport with a 4.7 V8 magnum 5 speed manual. I got this truck and it drove just fine. I've driven manuals so I know it isn't rough driving but the problem is when I have it in any gear it wont accelerate or will slowly go if the pedal is floored. The clutch feels fine, shifts fine but my RPM's shoot and skyrocket quick to at most 5,000. Once I shift to second same thing but if I floor it then it starts to accelerate but not like usual when I park I shut the truck off and I smell some burning smell I checked the throttle cable and it was loose so I adjusted it then I checked the throttle body valve and it was spotless reverse same as other gears. Clutch nothing but a better pedal but still same thing so far. I've just been looking don't want to mess anything up but I need to figure out what it is and if it is a major problem. If it is something big I'm going to leave it to the professionals. Is it a possible recall? There's no error lights or anything. All internal electrical and mechanical works. And no problems with the battery never stutters to starting fact recently replaced a battery connector.