Hi. I have a 2007 mini cooper with 92k manual, when I start it up cold it has a bad misfire(sounds like it's going to run out of fuel) for about 7/8 seconds then the misfire goes much better. Revs up fine.I have no engine light on and no fault codes, when I start it up I don't hear any bad rattling which I believe is the rattle of death from the timing chain so I don't think it's that hopefully. Can anyone help me please.

 

Can anyone help me please.