hi am glad your getting somewhere, it is frustrating that bmw mini have mapped these diesels in such a Poor way to chase lower co2 readings. I boxed mine and have been testing the settings, having gone through five settings i have found a setting which almost 95% has taken the flat spot out. I will check the orange seal next. Hope you get it sorted ;-).
Last edited by Dixy72; Dec 4th, 2012 at 04:33 PM.
I think changing it won't affect MPG but it may affect your power a little.
For fuel efficiency, basic things to check are tire pressure, air and fuel filter and (although unlikely) sticking brake pads. Prior to about 50,000km my fuel consumption wasn't good either, but it settled down after 50,000km.
You might want to check the mass airflow sensor, if it's faulty that will affect fuel consumption as will a dirty EGR valve.
What kind of tires and rims (i.e. size) have you got on the car?
Interesting results from the OBD scan. Unfortunately, I don't know where the thermostat is on the D.
Was the OBD indicating an error, or were you just reading the live data? I suppose 81°C isn't too far off 83°C, but I don't know the tolerances. I suspect if it was in cold mode, it might throw a code.
EDIT: I can't watch the following video, but according to the description it involves a thermostat change on a Citroen Berlingo 1.6HDi, which is the same engine as the Cooper D:
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