Can't get the engine to run right

What is your question?

What would cause the continuous engine codes.You It started with the cylinder seven misfiring so I changed the coilpack and plugs started up idle good no codes until after engine reached temp the coded for the mds fault. So I tore the engine down to the mds solenoid and replaced number seven put back together again ran fine until temp and coded injectors circuit fault and mis fire . So I replaced the rings on the injectors again ran good until temp and coded for injector fault. So I replaced all injectors switched coil packs and cleaned and checked gap on cylinder 7 plugs. Started up got to temp and coded for mds fault. So I bought 4 new solenoid s replaced them cleaned cylinder 7 plugs and switched coil packs. Ran good to temp and now shutters anytime I push the throttle code for injector circuit fault ( red lightening bolt ) and mds cylinder 7 fault ( yellow heck engine light ) and I have white smoke coming from exhaust.

How long has your 2007 Dodge Ram 1500 had this problem?

More than a week