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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?
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.
shift to neutral see if it helps, might be the tranny
IAC can be the verdict, going from a high RPM to low so suddenly and not being able to adjust quickly enough.