Low compression in the fifth cylinder

There are a few tests that can be done to check and confirm low compression. First, if the valve timing was out you would have problems on all cylinders, you can do what is called a wet and dry compression test, have the engine warm and do a normal compression test on the suspect cylinder and record the readings, then add a small amount of engine oil about a table spoon to that cylinder, this will seal off the rings while you do the wet test, with the oil in the cylinder do a compression test on number five if the reading increases considerably you will have a ring problem. If the reading stays about the same the problem will be a burnt valve. With this information we can determine the next best course of action to take. Please post back the findings for further assistance.