Turn down your wattage and move up slowly. Another thing, minor but important. When you put in a new coil, wait for the wicking inside the coil to saturate a bit. When I put in a new coil I usually take two or three hits without pushing the power button (this pulls liquid into the reservoir). Otherwise you're going to take a hit on an empty coil and you'll get that burnt hit. once the coil finally does have liquid, it'll take a little while to get the burnt taste a way.
Again turn down the wattage on your device, more isn't always better, new coil, saturate, then move up your wattage slowly until you learn what that coil can handle.