my car is a 2013 ford foucs st when i turn the key the dash lights up the engine cranks and starts but dies immediately the whole ignition system was changed but still wont start HELP ME

Sounds like fuel pump,if you replaced with new one,,try again,some new parts are bad to start with.

It can also be the ignition you just put in,it has smart key that must be programmed to your computer in your car

That's a lot of work to have done on a 2013 model vehicle. Might I ask what led you to do all the other work?

Iif it's a 2013 model, I dare say it would still be under factory warranty but if you've done all those things to it without giving the dealer the opportunity to rectify problems, it could well void the warranty.