Mmm. I have an issue with my GT.. I've owned my 2.0 JTS GT from new (2006 with only 36000 miles). She has again started misfiring when cold. Once warmed up a little misfire disappears and engine runs beautifully. I change the spark plugs and all four coil packs. Still I have this issue. Yesterday the Error Motore warning light came on. But then Error light went off and never came back on. Next morning again misfires until the engine is slightly warm, but not Error warning. This is not the first time I have replaced the coils, one was done a year ago, but then misfire went away.
Any ideas? I am praying it's not a cracked cylinder gasket.