Thought I had everything dialed in but guess not. Took for a drive today running driving good taking fuel right then I slow down and try to take off again and there’s hesitation one. It gets through low rpm hesitation it picks up but you let off and then try to go back in same thing. Thought maybe I was low on fuel but that didn’t make a difference. Not sure if it’s fuel or fire? If it’s sitting idling and you pump the throttle it’s fine. I recently installed a 195 t-stat new accelerator pump diaphragm spark plugs tuned to highest vacuum etc. timing is at 15 initial. Not sure if maybe it’s too lean? Seemed to do fine until up to full operating temp. Any ideas?