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Help-Rough Idle

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FireboltEric

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AEIO-360-A1B, 470TT On first start of day starts and idles normal for about 30 seconds, then starts idling very rough, like a dead cylinder. Very rough for another 30 seconds or so, then smooths out. All normal at engine run up and mag check, and normal in flight. Tried letting it cool for an hour or two, and it does not do it. Only cold starts. EGT's on 3 cylinders at idle were around 980, but #2 showed the same until rough, then dropped to 450 one time and 350 another. When it finally smooths out, EGT comes up to normal. Cleaned and swapped plugs and injectors between #2 and #4, issue stayed with #2. ???
 

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