Ford Escort

I have a 1997 Ford Escort it has a second motor and working on 110000 miles. I stopped at a stop sign a while ago and it made a noise just like a wrench or something fell off under the hood. I stopped and looked nothing under it or fell off. Can you give me an idea as to what it was. It didn't do it anymore.
January 22, 2007.

1997 Ford Escort 110000 miles 4 cylinders I tried to do this on another site and the answer was totally irrelevant but I had paid for it and they wouldn't make it good I will donate if you answer my question.

Jan 22, 2007.