1992 Honda Prelude Idle Surges but stops when AC is running. What is the cause?

SOURCE: 1992 Honda Prelude Timing Belt Diagram

There's no such thing as a timing belt diagram.

Do you mean to say the "Procedure" for changing a timing belt in a 92 Prelude?

By asking such a question I can only interpret it as a clear indication that you've never changed a timing belt before.

If this is true, then you don't want to start out or practice on your own car.

Get the car to a pro and have the job done right.

If not true (and you've changed timing belt's in the past)

Then give me the engine size and I'll post the:

"PROCEDURE" for changing the belt in a few hours.

SOURCE: 1982 Honda Prelude wont stay

try the control for the egr valve and check the egr valve if open
car will not idle from a 85 civic owner that did just a egr replacement and it was fixed ( ebay new egr valve was only 22.00)
parts store 69.00

SOURCE: 89 Honda Prelude failing emissions rich

is everything stock? and you have catalitic converter in place?

Stop by Schucks auto supply and have them run the codes. i'm sure there is a code if you cant pass emissions. your check engine light bulb is probably out.

and usually the first cause is the first o2 sensor.

SOURCE: 1989 honda prelude. engine surges. from normal to 2100 rpms

There is a warm up valve on the throttle body(should have 2 small coolant hoses). remove the valve and have someone start the car while you block the port to the valve on the intake. If that clears up the problem you can cut a piece of cardboard to mount in between the valve and intake.should straighten it out.

SOURCE: engine surges at idle 1992 honda prelude 2ltr auto

Make sure to clean the TB(on air intake), the IACV(on the rear of the intake), and the FITV(attached on the underside of the TB!