Car surges when air conditioning is on Inspection
Engine surging, revving up and down, or lurching when the A/C is turned on? An A/C surging inspection diagnoses failing A/C compressor clutches, dirty throttle bodies, bad idle control valves, and low refrigerant.Turning on the air conditioning places a sudden, heavy mechanical load on the engine through the serpentine belt, while simultaneously increasing electrical demand to power the condenser cooling fans.