I have a 2005 escape which when I turn it on the whole moter shakes. I got the codes P0351, P0353, and P0354. I have already change all the coils and spark plugs. But the problem is still there

 

First you need to stop throwing parts at this issue.
P0351 coil A

Ford Code: P0353 Definition: Ignition Coil C Primary Control Circuit/Open Description: This DTC sets when the PCM does not receive a valid ignition diagnostic monitor (IDM) pulse signal from the ignition module PCM.

P0354 is a generic OBD2 code that indicates that ignition coil “D”has an issue with the primary or secondary wiring circuits. If your Ford Flex has thrown this code, it may be accompanied by P0304.

You are likely looking for wiring damage (rodent), start testing properly, instead of guessing..

 

There are some tests you can do to hopefully isolate just where the problem is originating.
They are not complicated, but do get a little involved.
What we suspect is happening is an intermittent loss of either power to the coils or ground signal that comes from the vehicle computer.
There are some videos on U tube that explain the tests and demonstrate how to conduct them. Just type in what causes the codes you are receiving and there are several good ones to watch that you might want to try. If nothing else it will let you know what kind of equip you will need and how to go about doing the tests. Don't know if you want to go through that part or have a shop handle it.