stumbles and sometimes stalls
 

I have a 1990 Dakota, it idles fine, when you press the gas pedal it tries to die, but, if you just feather the petal it takes off ok, a bit slow but ok. It does this from a stand still, and at high speeds if you floor it to pass it also does it. I have a new O2 sensor and a new MAP sensor, also have tested the TPS and it checks out as good. any help would be appreciated.

How did you test the TPS? Did you use a digital meter, or analog?

both, first the digital, then the analog, tested both ways, they should read opposite yes?

Sorry, I mean I tested both poles, while one increases the other decreases. using both digital and analog.

Not sure I am understanding there..... :) Should be a 5 volt reference signal on one wire, a ground, and the signal return wire. Return signal should start low, less than one volt, and increase smoothly as you open the throttle. (analog meter is best for this test.) If there are any flat spots, or the needle bounces around, time for a new one. :D