AC Compressor bogs down engine

-do i buy a used one?
-do i buy a reman one?
-what else do i need - dessicant? condenser? TXV?

>>15877362
Guess what genius? When your compressor turns on, something tells the ecu to increase rpm. If you're getting a iacv code, I'd say that's the problem. Buy oem, always.

The air conditioner uses energy from your engine to work. Learn physics.

It's throwing an iacv code. The valve might be stuck in one position. If you're keen you'll notice that your idle drops when you turn back and forth

>>15877633
already replaced it with new one. old one had lots of carbon. also cleaned out egr passages. CEL is only triggered with AC

>>15877666
What car is it?

File: GettyImages_455662788.0.jpg (81KB, 1310x737px)

81KB, 1310x737px

Some moofmilker installed one on my ignition line when I took my vehicle in for a new panel, and now I have to rebuild my fucking hyperdrive.

>>15877362
What car

IACV can be clogged and not throw codes.
Take it off and clean it.

>>15877362
>The idle goes way down (~400-500rpm, normally ~700). It triggers a P0505 CEL ( IACV ) I took off the belt and spun the pulley with the clutch off and its fine (no real play, free spinning).

Check to make sure it's actually opening and closing. Sounds like when you activate the compressor, the IACV isn't opening as it should. That's why you see the drop because the compressor is drawing power, but the IACV can't make up for it at idle.

Check vac lines and connections while you're at it as well.

My M3 has done the same thing for 5 years Ive had it.