Ford Focus stays in 2 cylinders

Hello, I am checking a Ford Focus and I do not finish diagnosing it,
the problem is that it stays in 2 cylinders (2y3 work) to those who do not work arrives spark despite that and changed the coil, gasoline pump, cables and spark plugs
no longer I know what to look.
The cylinders that do not work (1 and 4) do not reach gasoline.
I hope help and thanks in advance to all

Focus ha a Waste Spark Ignition System with Two Coil Packs. Cylinders 1 and 4 Share A Coil Pack, As Cylinders 2 and 3 do. A problem can be a coil pack and cause misfire problems with cylinders it services. For More Details, You May Check This Video Justin Peters Explained About This Problem. Hope it Will Help.

Change the injectors 2.3 for 1.4. If it remains the same check wiring from Iny. 1 and 4 until the ECU, and if the wiring is well then probable failure in the Ecu

The injectors of these two cylinders may be damaged, poorly connected or short cables, you can check with a scanner the operation of the cylinders and possible system failures.