Car has had a miss for awhile. Thought it was the carb so i put a new one on. The miss was still there and with the other carb it started to idle badly. There is a clip with wires that goes into carb. With it in it won't idle with it off it idles. I looked at the distrubutor today and it had screws all the way throught so it was sparking to the screws causing it to miss. I fixed that today and put dual flows on it. It burned a half a tank going about 30-35 miles. Please help.