Tara,
I had just responsed to another user who wrote about a timing belt problem.
The Eclipse GS and GSX have 2.0 litre, Dual Over-Head Cam (DOHC) engines. You can tell if you have one of these really easy by opening the hood and look at the engine. It'll be written on there if it is. It is known as an "interference" engine. It requires very precise timing, and if that timing is off, there will be problems. If your timing is off or your timing belt broke, your pistons will bang into the valves. This can cause a very noisey engine. Those pistons hit the valves very hard and will eventually destroy them.

If you want to repair this, be prepared to pay a lot of money. You will want a very experienced mechanic. Do not take it to the local gas station mechanic. They will probably not have enough knowledge to do such an intense job. Your engine will probably need to be rebuilt. Estimated price to repair, about $2000.

You might consider buying another user Laser, Talon, or Eclipse and use your current Eclipse for spare parts.Have those valves checked first by the mechanic. If your belt broke, there is little hope of survival by the valves. But its possible they are still "good enough". The owner's manual says to replace your timing belt every 5 years/60,000 miles; even if it looks fine. I usually replace mine every 30,000 to 45,000 miles; just to be safe. My Eclipse is almost 13 years old, and I want to keep it at least 13 more.

Sorry to bring such bad news and I wish you the best.