Hi guys, as you may know I'm pretty new to z4's, not even had mine a week yet and the problems start
. Well it's the first time I've done a long drive in her (200 miles) and all was good, until I was about 3 miles from home. There are a series of round abouts linked my national speed limit A roads, I must admit I was driving her fast between these but nothing too excessive. Then after coming out of the final one and putting my foot down a bit, the engine management light comes on and the exhaust sounds really different, also she is lacking quite a bit of power. In the control systems (on the idrive) it comes up with no faults but seems to vibrate when I press on the pedal in the low rev range, like I said I was only 3 miles from home so I gently took her there. Does any one have any idea what this could be? I'm not mechanically minded so I have no clue what so ever, as far as I'm aware it is a standard exhaust oh and it's a 30i.