Pocky

Thanks for your replies Guys...this really helps and will give me something to work on...I'll report back when I know more.

But Karl...I have already replaced the Maf, as I, like you, thought this was the problem....but nothings changed :( After changing the MAF & connected it I only drove the car a mile or 2, noticed the problem was still there, so disconnected again...is it possible that the car needs a few miles to 'sort itself out' with the new part??

Hi Mr Beemer...Recently serviced & new plugs installed...Diagnostics did show up an ingnition coil fault, but that's now been dealt with. Like I said, without the Mass Air sensor connected she runs well.

Hi, I'm new to BMW & still finding my feet a little. I have a 2003 (E46) 316i. The car has a very rough idle and when I drive it the mph does not read as it should for what the revs read. If I put my foot down, it runs rough, like it's misfiring for a second or 2 then it kicks in & sounds as it should, all cylinders firing, although the power is just not there and like I said before the rph do not match what the mph should read i.e. 4,000 revs accelerating but speedo creeping up from 30 to 40mph.......Unplug the Mass air sensor and she runs near on perfect!!! I know it's not the mass air sensor though as I have already replaced this...result remains the same...Help!! Oh, one other thing...the power train light is on when the mass air sensor is disconnected, it goes out when connected.