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 03:33 PM.
Reason: typo
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?
right then took the car on a long motorway driver yesterday.
plugged the obd2 reader into the car and had the laptop on the whole drive and it took 15-20 mins to get to 79 degrees and then stayed there the whole drive occasionally getting to 81.
i have had a look at parts suppliers and the thermostat is rated from 83 degrees.
could thawt mean the car is running in cold mode and over fueling?
also at 2000rpm when putting your foot down there was a lot of white/grey smoke being kicked out the back
for the 120 mile drive at a steady 75-80mph it still only rasied the mpg counter to 44.6
any ideas?
Update.... Just done another 120 mile motorway drive and its pushed the past tank and a half average to 47.7mpg which is still low I think for motorway driving
Last edited by Benlg81; Dec 9th, 2012 at 05:49 PM.
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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