lost of power

my 2002 320i stumbles at around 100 kph, rpm goes very erratic. It also lost power on acceleration and the milage went down. I changed the fuel filter, 2 pre cat O2 sensors, air filter and cleaned the MAF sensor. The problem is still there. Please help!!!!!

Hey guys I am having a strange issue with my car. I have a 2002 330Ci with about 130k on it. Randomly when the car is at idle or when I am at a stop light it will sputter and start running rough. It almost seems as if one or more spark plugs is missing. There is a major loss of power but I can...