Mine will idle out and stall sometimes when comming to a stop. Moreso when it is under high electrical load (headlights + stereo). So i'm pretty sure my prob is wiring related. Also when starting it when cold the idle hunts for about 10secs. Is it AFM?
It wouldnt be the o2 sensor because that is only used when in cruise.
Have you had the car for long, I think I saw you turning off evans road near the BP one day (ages ago). Very nice ride. I wasnt in my sprinter, otherwise I woulda waved