It is not uncommon for an engine to bog down when the compressor comes on especially these smaller 4 cylinder engines. However, if this is noticeably different then the likely cause of this is a faulty compressor.
Basically the compressor is slightly locked up which means when the clutch engages it actually slows the engine down.
I would suggest contacting the company that sold it to you or installed this and have them inspect it.
https://www.2carpros.com/articles/replace-air-conditioner-compressor
Also, what do the RPMs drop to when this happens? Does it only do this when idling or while you are driving as well? Do you notice a lack of power?
https://www.2carpros.com/articles/symptoms-of-low-engine-power
Maybe if you get a video of this, that will help with getting us on the same page. Thanks
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Wednesday, June 16th, 2021 AT 6:13 PM