has problem driving down the road

What is your question?

hi i have a 1990 bronco and i love it. the problem is when i drive it down the road and i get it up past 45mph it starts to cut out. the check engine light starts to flash and the truck starts to jerk like it is not getting gas but, give it alittle more pedal and it takes off.i just changed the tps and check out the egr valve. i also changed the fuel filter and put an additive in the fuel. the codes that it rattles off are 2-tps, 1-egr 1-fuel relay short, and 1-emc problem with the pip. i am stumped. please help! thanks, chad.