What would cause me to sweat a lot i'm 54 have diabetes and coronary artery disease?

Multiple causes: Sweating implies excessive Adrenalin secretion (sympathetic nerve stimulation). This could happen for multiple reasons. Poor stamina, cardiac dysfunction, BP abnormalities, low blood sugar, excessive thyroid, infection, and autonomic nervous system dysfunction due to oth physiologic stressors are some of the possibilities. If no obvious cause, would suggest you see your doctor for checkup.