Audi A3 TDI - Using fuel

[AudiLeon]

We have a 2001 100bhp TDI A3.
It's doing around 47 mpg on runs lately. I reckon it should be doing alot more.

What are the first things to check? I have vagcom if there's anything worth checking using that?
I've changed the thermostat and temp sensor. No better.

Cheers in advance.

 

[Fahim]

Check for boost leaks with VAG COM to look for 'Requested boost and actual boost' figures.

if requested boost is high and actual boost is low, you know you've got a leak somewhere! it'll also probably be smoking quite a lot.

disconnect maf sensor and see how it drives. if its the same, then its most likely shot. exchange unit from audi costs around £70.

what sort of run are you doing? how many miles?...motorway or town?

 

[AudiLeon]

Country side runs, about 15 miles aday, relatively easy runs, 80% of the drive is on a main road, ussual just in 5th rolling along.
I was looking at the car today, whilst idling I disconnected the maf. The revs didn't change at all.

 

[AudiLeon]

Took it for a drive without the maf, and it was totally gutless.

 

[sulaiman]

Seems good to me, I get 37mpg around town, 45mpg on the motorway.

 

[AudiLeon]

Seems good to me, I get 37mpg around town, 45mpg on the motorway.

My 2.5 tdi quattro is doing 45 on the motorway!

 

[HerefordQuattro]

My 2.5 tdi quattro is doing 45 on the motorway!

****** hell wish mine did!

 

[swarcup]

**** me too!!!!!

 

[AudiLeon]

Sorry gents, I must be a gentle driver lol.
I recently did a 300 mile journey to invergarry in scotland. Got there, filled up 44.8mpg worked out at the pump. I was rather happy with that.

The A3 should be doing more.

 

[AudiLeon]

Do these tell you anything? I'm not sure if that's normal