l had starting problems so dodge put 2 new injectors # 3,4 and now it smoking. any time you take off or throttel it is real bad. its a blackish gray what would make it do that

Injectors should have all been replaced at that time.

Fuel pressure not being regulated properly. Make sure you have had the updated intank fuel pump module installed.

Know you have injector issues> did they change the Injectors or rebuild them as there not working> there leaking> Check your oil as they will fill the crankcase with fuel>

l think you still have an injector problem, get it warm and check the exhaust manifold with a heat gun. Your hottest one will be your problem.(The temp will be 100 or so above the rest)