I have a 1989 chevy s10 4x4 standerd cab 4.3 liter trotel body injected.When it gets above 70 deg out it dies in traffic and going down highway.I let it set for a sec it starts and goes for a while before it does it again.When it is cold out i dont have a problem.Can any one help me.I have changed throtel pos sen map sen air fuel sen ing module cap roter and wires.When i plug it in i get egr code .I have replaced it also.Need help.Thanks