From a respected tech: Provides ref data used by AC, some emissions components and signal for RPM gage.

I fail to see how the CPS can stall the car. I'd unplug it as see if your stalling issues cease; if it does look to the K40 relay, SOV and a new mechanic.

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)