Why does idle drop when the AC is on?
Why does idle drop when the AC is on? if the a/c is overcharged or the expansion valve isnt equalizing it can cause excessive resistence of the compressor wheel and excessive drag on the motor. Ive seen it quite a bit Loading... I have the same problem with my idle dropping when the AC is turned on and it was the ISC. What are the symptoms of an idle air control valve? One of the most common symptoms commonly associated with a problematic idle air control valve is irregular idle speed. The idle air control valve is programmed to regulate...