After driving for 20 minutes and going to town, my 77 midget runs rough at low idle. If I step down hard on the gas it runs great, but at low rpm when hot, it sputters and spits. I installed headers, but it did the same before. I do not have a heat shield, will it make a difference even with the headers on? I figured since the headers were on it would breath better and not contain the heat as before. Thanks, Jerry /ubbthreads/images/graemlins/thirsty.gif