Recently noticed the high output burner on my stove is a tad loud and there is a section of openings that do not light on the burner. This moves if I gently blow on them. Also oven pilot has phases...
You need to make a manometer. Basically it's a clear tube at least 30 inches long that you fill part way with water. Make the tube into a loop, remove a burner and slip one end over the spud. Turn on the gas, the water level should move about 11 inches up the tube.