Bro, I got an enquiry here. I have a Proton Wira with a 4G92 MIVEC engine (1.6 litre, using the Proton 4G92 block). I recently got my compressor changed as the previous one was faulty. I got a recond unit, and it's a rotary-type compressor (same as the older one).

Problem I'm facing is that whenever I switch on the aircond, the engine power drops a lot! When idling, it's about 1100rpm with the AC off, but when the AC's on, it drops to about 400rpm. Besides that, even when cruising on 5th gear at say... 100kmh, I can still feel the sudden pull when the AC comes on. I also faced the same problem with the older compressor.

Is there any way to overcome this problem? Perhaps get a different model, and modify the mounting and piping to fit my engine? I also have a Year 2000 Proton Waja, which is completely stock. Simply love that compressor as there is absolutely no noticeable drop in RPM and power when the AC comes on. On top of that, it's also cool even at the lowest setting...

Sorry for such a long message, but really hope you can help me out here...

Thanks for the advice bro. Tuning it meaning... tuning the engine or compressor?