I have a 1997 Accord Special Edition (basically LX). I rear ended another car, not too major, his bumper was pushed in bad, but my car sustained no visible damage. There was some of his paint on the screws to my license plate. I hit him square from directly behind.

It has been a week or so and my car is driving normally, but I notice some noise when I am driving at low speeds with the windows open. It seems to happen when I let go of the gas pedal. It sounds like clicking or a fan making some noise. When I let go of the gas, it starts fast, then slows down and stops, imagine a fan that makes a clicking noise, how it would sound as it comes to a stop. The sound doesn't seem to repeat again when I accelerate, but it does it again when I let off the gas.

Looking under the hood while it is running I haven't been able to see or hear anything odd even revving the engine.

Any ideas?