Warm Engine Idle Issue

gtsdude said
Sounds like possibly the fuel boiling? My 340 dart was doing the same thing on warm day, had hesitation and not idling well, I opened the hood and took the air cleaner off with it running and had fuel coming out the accelerator pumps on my holley carb. I shut It off and fuel continued to squirt out both accelerator pumps. After it cooled down it stopped and was back to normal.

I thought this may be the reason too. I have installed a carb spacer which helps and adjusted the fuel floats. I adjusted them to where fuel would trickle out of the fuel bowl holes only when rocking the car. I haven't noticed fuel dribbling onto the plates after the float adjustment. I may consider getting a carb heat shield as well.