I took the car into BMW to have a look at - they test drove the car and witnessed the high idling. They suggested they would need to bring it in for diagnostics and that might take up to three days to complete. I couldn't spare the car over the past couple of weeks, so it hasn't been in.
What I did do, however, was read the manual and note that it recommended 95RON fuel for M powered Coupes. So the last three tanks have been 95RON rather than Optimax or V Power and the idle problem and shuddering has completely disappeared. I've done a good 500 miles without incident in all kinds of weather barring snow/ice but give it a month...
What I did do, however, was read the manual and note that it recommended 95RON fuel for M powered Coupes. So the last three tanks have been 95RON rather than Optimax or V Power and the idle problem and shuddering has completely disappeared. I've done a good 500 miles without incident in all kinds of weather barring snow/ice but give it a month...
Comment