why is my cars idle so weird and why will it not stay running

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well I was driving down the road set my cruise at 60 all of a sudden i saw my mph decline and all my internal lights stayed the same radio still on my car just lost power steering and i pulled over went to start it again and it will start for a few seconds then shut right off. Ive changed the Starter selenoid changed oil and the filter changed fuel filter got a new gas cap changed the cam sensor new air filter new spark plugs pcv valve before this all happened with the break down I would have to hammer the gas to start it up and Id have to drive really slow when id come to a stop or put it in reverse or drive itd die and id have to repeat the process of starting it back up took it to Autozone and they had a TON of codes on it and they were all some sort of air issues and misfires can anyone help me?