RPM falls when a/c starts
 

I have civic-98 EXI. Its RPM is set around 1000. When ever i start a/c,,, RPM falls around 400. When a/c compressor stops on its timing rpm rises to normal 1000 and when compressor starts again it decreases again around 400. What would be the problem? Plz help....

Dirty IACV, or condenser fan not working.

Thnx mk378,,, i will let my mechanic check both IACV & condenser fan.
Actually my mechanic was asking me to scan my car computer unit... I was confused about that,,, so I will first work on your advice... Thnx again