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What can I do to fix this problem on 1999 Ford Expedition

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Got a PO353, PO356,PO358 after changing all Spark Plugs and all Coil on Plugs, also getting misfire when gas pedal is released
Starts up fine
Checked connects look okay
Checked spark plugs look okay
Checked wiring
(1) Answer
(1) Comments
rec. fuel system clean. ethanol treatment to 1 tank premium fuel. get fuel running through clean to eliminate fouled injectors as possibility.
I also cleaned tank and lines, also new injectors,new EGR Valve, Trottle position sensor, EGR Position sensor, ICV what else can be done