Thanks for posting the solution, and sounds like a happy ending!

Learned from this thread... Sounds like with the m103 you have to replace the IAC and Mechanical MAF sensor to get an old one "back in shape.". With the m104 all that stuff is integrated (including TPS) into an ETA which is $800 refurbished. The new IAC was $120 for OEM after careful shopping, and $35 for a refurbed " fleabay" MAF. Carbon trace was redone it looks like. Supposedly the m104 is a nicer riding engine, and less finicky though.