ECU Reset: Where is the battery ?

[Chucky666UK]

Ok, I know I am quite embarassed to ask this question, but can someone help me here??? Where is the battery???? I want to do an ECU reset to see if it helps solve my low mpg problem.

Cheers in advance!

[a8 tech]

it wont and its in the boot (spare wheel)

[Chucky666UK]

it wont and its in the boot (spare wheel)

Thanks!!! Why did you say it wont?? Have you tried this?

[theskyfox]

Hi Chucky,
Just curious as to why you want to reset the ECU. As far as I know it just monitors the engine and adjusts the fuel for the conditions based on feedback from the sensors. I.E..even if u totally reset it..its just going to do what it did before again...as there are so many different variables that control how much fuel you burn. E.g. Quality of fuel/Octane/Cetane, Air temperature/pressure/humidity, number of revs, oil temperature, tyre inflation yada yada yada...

What car is it? Mileage? Fuel type?

-Andrew

[Chucky666UK]

Hi Chucky,
Just curious as to why you want to reset the ECU. As far as I know it just monitors the engine and adjusts the fuel for the conditions based on feedback from the sensors. I.E..even if u totally reset it..its just going to do what it did before again...as there are so many different variables that control how much fuel you burn. E.g. Quality of fuel/Octane/Cetane, Air temperature/pressure/humidity, number of revs, oil temperature, tyre inflation yada yada yada...

What car is it? Mileage? Fuel type?

-Andrew

Tried to reset ECU since I have been experiencing 26 mpg around town. Just replaced MAF and no difference really. I have a 2009 A4 2.0 TDI 143 S line Multi. It seems as though its running too rich and doing about 50 miles per tenner, which includes some 20 mile cruises!

[bez101]

get a fault code read
aint you got a warranty

[Chucky666UK]

get a fault code read
aint you got a warranty

Yes I got warranty!! Been to the dealers twice. They say no fault codes and can't see anything wrong. I cAnt be wrong either when 2.0 tdi is only give 330 miles to a tank!!

[Big Bird]

330 miles to a tank!!

Bloody hell!! Can manage more than that when thrashing my 2.0TFSi Quattro!!!!!!

[Chucky666UK]

Bloody hell!! Can manage more than that when thrashing my 2.0TFSi Quattro!!!!!!

Its comments like these that depress me more (I drive mine like a grandad)!!!! Wish i bought a 2.0TFSi now!!

[Big Bird]

Its comments like these that depress me more (I drive mine like a grandad)!!!! Wish i bought a 2.0TFSi now!!

Sorry mate, didn't mean to hurt your feelings.....!

I've only driven one tdi, and that was a courtesy car from audi, and during my 2 days and 130 miles, probably got around 36-44 mpg, and i dont drive with fuel in mind.....!!!!!!! Seems to me like you have an issue- get it looked at.

I had mine all over Scotland last week, and didnt hang back on the quiet and deserted roads. Had loads of fun and got around 350 miles to a tank, easy. Taking it easy coming back down the A9 i managed 38-40mpg by sitting at 60, bang on (lots of camera vans).