shaking at 50 to 60 mph

mrmojorisin69

Registered
I put to new rear tires on my car and an oil change. When I got my car back it started shaking on the highway. This went on for a week till I got it to the shop and before I brought it there it started to shutter at low speeds. I thought it was a wheel un-balance, but then the engine started to act up. Now I have a problem. I seem to lost a lot of power from the engine. The rubber seal at the throttle body and the intake air tube is loose. I replaced the coils and it ran half way better then normal. I next replaced the plugs and wires w/ motorcraft parts and then codes came back that 1-2-3-4 coil circuits.
codes:
215-coil 1
216-coil 2
217=coil 3
238- coil 4

any help would be great!!!!!
 
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