Cadillac Repair: back firing, cadilac, e mail

Question
my 92 cadilac deville wont start but back fires what could be wrong with it

Answer
IS or HAS the CHECK ENGINE light ever illuminated while driving the vehicle and or has any other lights illuminated or any messages from the message display center ?.

What work or diagnostics of ANYKIND WHAT-SO-EVER have been performed on the vehicle trying to fix this problem ?.

Please e-mail: onlineautohelp@msn.com