I have had my 220d in for an oild seal fix and that involved disconnecting the battery for 8 hours which reset all the electronics back to default settings, including the ECU. There was an istant recovery in the MPG bck to the levels of a new 220d. As I mentioned on another post the Service Manager at Bristol mentioned that the car has a self learning ECU that works out how I drive and then sets the performance/consumption to that. Hence the gradual degredation of MPG and why people have such differening experiences of MPG. Seems that it is nothing to do with the 5th Injector but the way you drive it. He commented that a number of people who had the oil seal done saw an improvement in MPG when they got the car back.
The solution we agreed was that when I suffer bad MPG I get the ECU reset to the default setting and start teaching the car how to drive again!
The mpg went from 38.7 to 44 in an instant and I can now cruise at 80 in 6th and see the Current MPG hover round the 60mpg mark. So, get the battery disconnected for a few hours and see the mpg come back. You have to reset all the radio stations again but thats a small price to get the performamnce back!
Full Version: Teaching An Old Dog New Tricks
QUOTE
The solution we agreed was that when I suffer bad MPG I get the ECU reset to the default setting and start teaching the car how to drive again!
The mpg went from 38.7 to 44 in an instant and I can now cruise at 80 in 6th and see the Current MPG hover round the 60mpg mark. So, get the battery disconnected for a few hours and see the mpg come back. You have to reset all the radio stations again but thats a small price to get the performamnce back!
The mpg went from 38.7 to 44 in an instant and I can now cruise at 80 in 6th and see the Current MPG hover round the 60mpg mark. So, get the battery disconnected for a few hours and see the mpg come back. You have to reset all the radio stations again but thats a small price to get the performamnce back!
...and all pigs refuelled and ready for take off
Oh you cynic. Its worked for me and looking back its happened at a couple pf prebious servies!
I am worried about this.
The RX's have had threads about the self learning auto box and lurching, and how some have had to have ECU's reset as a matter of course...
At the last service (2 weeks ago), mine came back with all Satnav Desinations gone, radio stations defaulted etc, so I assume all of the above has happened to mine.
And then when you talk about :
It implies that the seal poblem is common place...though I have never heard of this before.
Oh boy. Just when my Blood pressure was hovering at 135/85
10-9-8-7-6-....OOooooooooom
The RX's have had threads about the self learning auto box and lurching, and how some have had to have ECU's reset as a matter of course...
At the last service (2 weeks ago), mine came back with all Satnav Desinations gone, radio stations defaulted etc, so I assume all of the above has happened to mine.
And then when you talk about :
QUOTE
He commented that a number of people who had the oil seal done saw an improvement in MPG when they got the car back.
It implies that the seal poblem is common place...though I have never heard of this before.
Oh boy. Just when my Blood pressure was hovering at 135/85
10-9-8-7-6-....OOooooooooom
lol, interestingly, this was the title of my presentation i did yesterday !! (New tricks for an old dog)
made me chuckle anyhows
Maybe that's the new Lexus solution to the diesel mpg, program into the ECU a battery switch-off overnight once a fortnight 
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