Hi,
since getting my '04 B6 Avant 1.9TDi 130 AVF i've tracked the real world mpg (not trip) and have been averaging between 40 and 42mpg. The last two tanks have been 37.8 and 37.3, thats quite a drop compared to any other tank (tracked over 4000 miles in total), so i'd like to try and find out whats caused this.
The car was remapped for the most recent tank, however the mpg dropped before the remap, so that cannot be to blame.
The fuel filter was replaced around 4000 miles ago, air filter was checked and was fine as it had had a service only 3000 miles before that.
Power doesn't seem to have dropped, even when standard i used a mobile phone dyno app and it quoted about 132bhp (very very very rough guide i know) but it doesn't feel down on power, and after the remap it does feel sprightly.
So I would appear to have dropped around 5mpg but without any power loss. My initial thinking was MAF but then whenever i've read about that people seem to have power losses too. The only other thing i can think of at the minute is the air conditioning being under a lot more load with the warmer weather more recently, but i don't think this would cause such a significant drop.
Any help is appreciated - i have my own genuine VCDS to use.
Thanks!
since getting my '04 B6 Avant 1.9TDi 130 AVF i've tracked the real world mpg (not trip) and have been averaging between 40 and 42mpg. The last two tanks have been 37.8 and 37.3, thats quite a drop compared to any other tank (tracked over 4000 miles in total), so i'd like to try and find out whats caused this.
The car was remapped for the most recent tank, however the mpg dropped before the remap, so that cannot be to blame.
The fuel filter was replaced around 4000 miles ago, air filter was checked and was fine as it had had a service only 3000 miles before that.
Power doesn't seem to have dropped, even when standard i used a mobile phone dyno app and it quoted about 132bhp (very very very rough guide i know) but it doesn't feel down on power, and after the remap it does feel sprightly.
So I would appear to have dropped around 5mpg but without any power loss. My initial thinking was MAF but then whenever i've read about that people seem to have power losses too. The only other thing i can think of at the minute is the air conditioning being under a lot more load with the warmer weather more recently, but i don't think this would cause such a significant drop.
Any help is appreciated - i have my own genuine VCDS to use.
Thanks!
