In article <1147324133.342725.111130@q12g2000cwa.googlegroups .com>,
"Physics Boy Wonder" <PhysicsBoyWonder@gmail.com> wrote:

I am trying to fix up an 86 Honda Accord DX that I just recently
bought. It idles really badly and I don't know what the problem might
be. When I stop the RPM bounces from 1,300 to 200. It also frequently
dies in the process of fluctuation. As a result I have to throw the car
in neutral when ever I come to a stop and keep the engine revving at
about 1,500 RPMs. Do you have any ideas of what the problem could be?

These are some of the causes for this problem:
Vacuum leakage.

Defective EGR valve.

Air Filter clogged.

Fuel pump not delivering sufficient fuel.

Leaking head gasket.

Timing belt and/or pulleys worn.

Camshaft lobes worn

Problem in Engine Mount Control System.

You may want to take the car to a mechanic and have him or her hook it up
to the Diagnostic Computerized Engine Tester. In some cases, this is
cheaper than spending hours of time and / or replacing parts that are in
perfect working order.
Jason