OK...
Long story short radiator blew 3 days before Christmas and I have been repairing the whole coolant system between snow, rain, polar vortexes and parts deliveries. During the course of this the car became ridiculously low on gas and the battery died.
With everything back together I went for a ride yesterday to get gas and found that the idle of the car would drop really low when coming to a stop sign or stop light nearly causing it to stall. I held my foot on the accelerator to keep the revs up and got back home just fine. Once parked in the driveway I let it idle again and it dropped real low and then settled at the normal idle rate. Check plugs and coils and everything looked good. Ran the scan with the foxwell 510 and came back with nothing besides and airbag sensor and secondary MAF issue (which has been on going for so long Its part of the daily routine). I am going to go at the DISA valve when i got home and see if that is the culprit as I lost light in the driveway and could locate my T-40 at the time.
Is DISA the next logical step? Is there a way to adjust the idle with the foxwell? Thanks in advance for helping my 6th BMW be the one I truly wrench on.

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This has been a long obsession.
Current Cars- 2006 X5 3.0, 2013 328i Xdrive Msport
Previous Cars- 2007 328i, 2007 Z4 3.0si, 2006 330ci, 1985 325e and a sampling of Fiats, Volvos and VWS along the way.