...Car starts up fine but as soon as i turn A/C on my car wants to die. Idle drops from 900 to under 500 and eventually stalls. What can this be?Battery and Alternator were replaced 10 days ago, Both of them were bad so i though that was my problem but nothings changed. I think my new battery will be on its way out also. Any ideas?

 

Normally the PCM will raise the idle speed to compensate for the load of the compressor when the AC is on. Sounds like your PCM is not commanding the higher idle. Have it scanned to see if the PCM is reporting the AC pressure.