RPM down when AC on
I have nissan sunny 2002, when i start engine rpm 700, when i on AC rpm 400
and vibration also start when i put gear in D
i think your idle speed control motor went out but you should have the codes checked and check you fuses
Clean your throttle body and check your throttle body sensor. This sensor is responsible for increasing and decreasing RPMs as driving conditions change..
Give the AC signal wire to Ecu.when you on the AC then signal is coming on Ecu and Ecu worked again idle control.
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