stevebootes
27-03-2009, 09:00 AM
Hi all,
First post so please be gentle with me ;-)
I'm getting what I'd consider to be pretty poor fuel economy from my 2001 A4 Avant with a 115PD TDI Engine and an Auto-Tiptronic box.
My MFA Average currently says 31.2mpg.. not trusting this at all, I've worked out by hand from my fuel receipts (between full tanks) and I'm averaging around 36mpg. Fuel range on a full tank until fuel light comes on is normally around 380-400 miles. The best I've had is around 450 miles from a tank if I'm really careful on long cruises (though again, I fill up when the fuel warning comes on rather than fully empty).
I've ran various diagnostic tests with VAG-COM, including MAF sensor and Boost level checks. No problems there, no fault codes found, everything looks fine. I'm local to APS (the tuning company) so I dropped it down to them to take a look over, they couldn't find any faults with it.
The performance has always seemed a little poor to me - but then I came from a B6 S4 with full Miltek system so everything seems a little underpowered after that.
Brakes don't seem to be binding, I don't have any black smoke under load, no other obvious signs of problems. I do have what appears to be a slightly noisy aircon compressor - I can't believe that would have such a big effect on things but who knows. I have tried running with the aircon off on long journeys, which hasn't made any noticeable difference.
Am I being unrealistic for an Auto 115TDI? I previously had a TDI130 B6 A4, drove that hard and never got less than 550 miles from a tank, so I expected something similar from this car.
Any suggestions appreciated!
Steve
First post so please be gentle with me ;-)
I'm getting what I'd consider to be pretty poor fuel economy from my 2001 A4 Avant with a 115PD TDI Engine and an Auto-Tiptronic box.
My MFA Average currently says 31.2mpg.. not trusting this at all, I've worked out by hand from my fuel receipts (between full tanks) and I'm averaging around 36mpg. Fuel range on a full tank until fuel light comes on is normally around 380-400 miles. The best I've had is around 450 miles from a tank if I'm really careful on long cruises (though again, I fill up when the fuel warning comes on rather than fully empty).
I've ran various diagnostic tests with VAG-COM, including MAF sensor and Boost level checks. No problems there, no fault codes found, everything looks fine. I'm local to APS (the tuning company) so I dropped it down to them to take a look over, they couldn't find any faults with it.
The performance has always seemed a little poor to me - but then I came from a B6 S4 with full Miltek system so everything seems a little underpowered after that.
Brakes don't seem to be binding, I don't have any black smoke under load, no other obvious signs of problems. I do have what appears to be a slightly noisy aircon compressor - I can't believe that would have such a big effect on things but who knows. I have tried running with the aircon off on long journeys, which hasn't made any noticeable difference.
Am I being unrealistic for an Auto 115TDI? I previously had a TDI130 B6 A4, drove that hard and never got less than 550 miles from a tank, so I expected something similar from this car.
Any suggestions appreciated!
Steve