tapping noise in 2004 mitsubishi eclipse gt

Does it sound like its tapping under the valve covers? If so its probably lifter tick. Common on mits cars. But if it sounds like it's on the belts side of the engine have it checked out ASAP. If sound is coming from under the timing belt cover shut it down and have repaired ASAP. A torn timing belt can make a ticking sort of sound. These cars have interference engines. This means if timing belt breaks or jumps time you will end up with bent valves. Also if you are still running the factory timing belt and are over 100000 miles then you need your timing belt, timing idler pullies and water pump replaced ASAP.