Suddenly running rich

[Mlcdc1]

I’m at a loss. I did a rebuild on the quadrajet, had it dialed in pretty good, ran it for a couple of weeks, and then a few days ago, it began to run rich at idle and off idle. The only thing I can say that has changed is the temperatures have gotten quite hot since about 5 days ago. I’m wondering about heat soak or vapor lock as a possible cause? Any thoughts?

 

[Ricko1966]

Have you looked under the hood at all. Is the choke opening,did the wire come off the choke heater,did a vacuum line split,did your vacuum advance cannister die?