Hi , I have a honda civic ex 96 ,when is in idle and I turn on the a/c the rpm fluctuate, its go about 100 rpm up and down not that much, sometime went I accelerated to 2,000 rpm and let it go back to idle it work normal ,but most of the time that I'm driving and it goes to idle start fluctuate again.

Please if somebody knows how to fix this problem let me know

THANK YOU
Jlatin

It's difficult to know for sure what's wrong. I would replace basic, fundamental maintenance items first; e.g. spark plugs (only use the NGK plugs that came in your car), fuel filter, rotor, igniter, coil, distributor cap, and spark plug wires. Later, I would replace the main relay. After you know that everything is new, I would warm up your car and set your idle rpm, using a tachometer. Finally, I would check the car's timing.

Thanks I will do that ,I hope it fix the problem

If your car is automatic, have your mass airflow sensor cleaned as well as your IACV (servo). Replace your air filter element if excessively dirty

My 1997 mazda 626 had the same problem as with your car. Try what I did. Have your mass airflow sensor & IACV (servo) cleaned if your car is anutomatic. Replace your air filter element if excessively dirty. My car came back to its normal condition