turns off after medium-hard stops

[Volta Pikachu]

every once in a while i'll be driving and i'll have to make a hard stop and all of a sudden, my car just shakes (after coming to a stop) and turns off, (happens when the rpm hits 0)

would this be connected to my IAC code that i've had for a while? and the idle problems it has? i've changed the TB before and it still has the code , but anyways, yea! any ideas? maybe o2 sensor?

[RedGalant2k1]

The power brake system on modern vehicles helps build vacuum. If there is a vacuum problem, you may experience this sort of issue. So, yes, it may be related to the IAC code you had previously got. I would suggest referring to the vacuum diagram, and then inspect each vacuum line physically, make sure they are not damaged or leaking. Replace or repair accordingly.

[w/oarctic7g]

shift to neutral see if it helps, might be the tranny

[oakrdrs187]

IAC can be the verdict, going from a high RPM to low so suddenly and not being able to adjust quickly enough.