Engine crank but will not start up

I got some misfiring in cylinder one, two and three. I put in new spark plugs and coils that did not solve the problem. I heard fuel injector can set a code, so I change all the fuel injectors. I started the car to check for gas leaks there was no leak. I notice I did not have the squeak when rev up the engine and the engine does not idle up down anymore. I erase the codes. I let the car run about thirty minutes no codes showed up. I turn the car off about four hours I try restart the car all did just turn over no start. I did not have this no starting problem until I replace the fuel injectors. What did I do wrong?