flashing check engine light means there is a severe misfire. seeing how it is a 1.8t, ide say more than likely the coilpacks need to be replaced. Could also be spark plugs if you havnt changed them in a long time. Those are the two most common. Coilpacks are about $25-30 each at the dealer, and VERY simple to replace. a way you can test this is to start the car and just pull the coilpack up off the plug. if the engine starts to stutter more, that coilpack is still ok. If engine does not change, that coilpack is bad. Personally ide just replace all 4 anyway. if ones gone the others arnt far behind.
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