Cadillac Repair: flooding out & wont run, cold air intake, billows

Question
on start  up  a  4.5  eldorado immeadiately chokes down & billows
very heavy black smoke  un till it dies . if  it sits  for 2-3  hrs  it will start  easily.  is this  due  to a  sensor ??  the cold  air  intake  one ??

Answer
ais or HAS the CHECK ENGINE light ever illuminated while driving the vehicle prior to thios problem ?.

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