'89 dakota bogging down

I have no idea what is going on with my truck. It will be running fine and then it will start to bog down when the throttle is past halfway. I had to limp it home today at 35 mph today from work. Does anyone have any idea what could be going on. I checked the cat. conv. and that wasnt the problem, nor the fuel filter. could a fuel pump act up like that? Any info would be greatly appreciated. Thanks

try this link and use it to see if you have any codes from the computer then let me know.
http://minimopar.knizefamily.net/fault/index.html

sounds like a throttle position sensor to me (TPS)