You can find Part 1 to this saga here...
Car cranks but doesn't start
A new ACDelco H7 AGM battery was delivered and installed today, replacing the Bosch H8.  For the past 5 days, since the replacement of AOS, the car had no trouble starting.
Rather than staying true to, "Don't fix what's not broken", I changed the battery to ACDelco and the car idled rough.  I understand this is expected when you disconnect battery so I wasn't worried.
I was careful to watch the charging voltage via this tool I have.  It was 14.30ish volts.
Anyway, about 5~10 mins into idling, car died.  And I can't start the car anymore.
Why would a car die while idling?  
A blocked fuel filter?  
Bad plugs?  Did the AOS failing contaminated the plugs?
What do you guys think?
Thanks in advance.