Apparently my Z is REALLY 'special'..

Drakonis GTR

So there are no common denominators what so ever as to when she idles fine, and when she stalls? Ambient temperature, hard/soft driving on the trip before, particular type or brand of gas you've been filling it with, etc? If all they have done in a month's time is check/replace all of the electrical and throw the scanner on it a hundred times, I would be wondering if they are really spending any time on your car. Every dealership hates warranty work, they make little money off of it. If I were you, I would start getting on their *** hard core. Tell them that if this engineer can't figure it out, you want a new Z.

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2009 Nissan 370Z Base w/ Sport Package
F.I . LTHs with Non-Resonated Cat-back exhaust (C.F.) / Stillen Gen3 CAI / Up-Rev Tune