Car RPM drops when AC is turned On

[pwuser148229062056]

Salaam brothers!

I have a Liana 2006 (RXi) and got its AC work done recently. Now I am facing an issue that when AC is turned on, the car starts dropping RPM from 800 to 500~600 and then the RPM needle shoots up again to 1000 and then starts dropping again. I have got it checked from multiple electricians in Lahore and the comments they have given are;

• The car's electronic choke needs to be checked and may need replacement.
• The car's engine is weak.
• The car's choke sensor may be faulty.

But no one knows for sure that what exactly is the root cause of this issue. I believe that being a 14 years old car, it's bound to have a few defects but every defect has a reason and AC is one of the basic features of a car so if something is wrong with it then it definitely needs a basic solution. Please guide and support brothers!

P.S. Two other friends of mine also own Liana 2006 (RXi) and both are facing the same problem. Their engine is 1500cc whereas mine is stock 1328cc.

[shockxwave]

Check refrigerant... it might be low therefore the compressor trips. Also check IACV (idle air control valve).
Also, does the RPM remain stable at 1000?? And the A/C keeps working?? If yes then that might be normal behaviour. As soon as A/C is turned on, engine takes load at first and RPM drops then the ECU stabilises it.

[ahmedlhr]

Your engine bearings are weak.replace with Genuine bearings .

[pwuser148229062056]

Please elaborate. How are engine bearings related to RPM dropping while AC is ON?

[scholar.center]

Throtle body may need to be serviced. As switching on AC increased load on engine. But rpm are not properly regulated by throtle body.