The coil packs are a common thing to go on the 1.8 T .... I had 2 go down on me recently on a trip, loss of power like the car was only running on 3 cylinders...
Ok heres my rough guide on replacing !!!
If you remove the engine cover you will see them plugged in on the top..square looking plug...
You can see which one or more have gone by running the engine and pulling a coil pack out with a pair of insulated plers/grips one at a time .. which should cause the engine to splutter/die when removed.. (Be careful as it will spark (clicking sound) if its working ok ..
The faulty one will appear to make no difference when pulled out and no spark so thats the one that will need replacing ..
They normally cost around £30 ($60) each here in the uk to replace.....
Hope that helps
