This issue is still present in my mothers car...........Could spark plugs be causing this? I have checked all vac. hoses can't find any that even start to look suspect. I replaced the MAF. I have checked the gasket that seals the MAF. I have made sure that the air filter housing sits totally down on the MAF. I have read a few things on other sites.

Possibilties:
Spark Plugs
Front O2 sensors
Faulter temp sensor (engine is thinking it is still cold giving it more fuel)

Anyone have any thoughts on any of these suggestions?

MB Doc. How could I check the oil seperator, or do you just take a gamble and replace and hope it fixes the issue?