With that last description I would say Water Temp Sensor. That is the normal culprit for that hard starting when cold condition. The sensor tells the fuel injection, CIS-E, the engine temp so it may fire the cold start valve, raise idle, and enrichen mixture for proper warmup. When the engine reaches normal temp it then sets mixture to normal closed loop and allows the EHA to mantain stoic mixture. If it is bad and the CIS-E thinks the engine is warm when cold then it will assume warmer when at proper temp thus leaning mixture too much causing your crappy off the line operation.

Also could be severe leak at the Intake Boot, the rubber between the AFM and the actual throttle body below it. Could be timing way off since the swap of engines as well. Or just a **** fuel filter, I am not a fan of WIX.

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~Jamie
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2003 Pewter C230K SC C1, C4, C5, C7, heated seats, CD Changer, and 6 Speed. ContiExtremes on the C7's.

1986 190E 2.3 Black, Auto, Mods to come soon.....