mitsubishi pajero intercooler(4M40)

[Kasun1990]

What is the part of AC RPM and engine RPM adjust?my engine RPM increase high when AC operating?

And place to buy the part?

[Davy]

It's called the Idle Air Control Valve (IACV) or Idle Control Valve for short. Some call it the Idle Control Solenoid. In Mitsubishi workshop manuals, it's referred to as the Stepper Motor. 

If you're looking for the parts in local shops, just say Idle Control Valve. You should be able to find a reconditioned one in Delkanda area. Or call Mahinda on 0714762223 and ask him if he has them in stock.

RPM fluctuation when the AC compressor switches on/off might also be due to a sticking IACV. So you should first remove it from the throttle body and clean it (the plunger section) with contact cleaner. Spray the cleaning liquid to a clean rag and wipe clean instead of directly spraying onto the IACV as Mitsubishi IACVs that come on these engines are highly susceptible to damage when cleaning liquid enters the motor chamber. 

Good luck! 

[The Don]

http://www.pocuk.com/forums/viewtopic.php?p=1454002

[Twin Turbo]

Start by checking the vacuum hose connection.

the electric actuator electrical connector,