horrible idle on focus and check engine light

My check engine light came on and now its vibrating when I idle like the car isn't getting gas or something. I have to push on the gas and breaks at the same time or it feels like its going to die. I took it into a garage and they flushed my fuel lines, then they gave me new sensors-- 300$ later its still happenening. Only now it wont die, it just idles really bad and shaky like the engine is reving up and then about to die over and over. HELP!!!!

Did the shop pull codes? What where they?

ya, the first time they said it was registering my fuel line. So the flushed them. But the light never went off so I took it back in. They said it was registering my cylinder sensors (I have no clue what those are). They replaced them because they said it was like my car was running on 2 cylinders instead of 4. Is this even possible? The car ran good for 2 days then the idling situation came back. The check eng light isn't back on, but its reving and then sounds like its going to die when I idle over and over. Any thoughts?

Cylinder sensor? The shop said that the comp saved one code, then turned around and said another? I've never heard of a 'cylinder sensor'...it sounds to me like you're being taken...

That is exactly what my brother said-- hahah. I am going to call them in the morning and find out exactly what codes they read. I think I am going to take it to the dealership. It will cost alot more, but hopefully they wont screw me over. I think I will take a guy with me this time:)