Major Fuel Issue

**vaslam1986** · 26-12-2006,08:27 AM

Hi guys, hope you'll be able to help me, I've got an 2002 Audi A4 1.9TDi 130bhp....Ive had for over 7 months now and was achieving on average in the region of 44-50mpg but this last month it dropped dramatically to under 30mpg and sometimes as low as 18-20mpg. I thought servicing it might help but it really hasn't made much of a difference. Any ideas on what it could be and how badly it's going to dent my wallet? Any help would be appreciated...

**adamss24** · 26-12-2006,01:21 PM

Replace MAF. If in doubt, search the forum for how to ! Good luck.

**vaslam1986** · 26-12-2006,02:24 PM

Originally Posted by adamss24

Replace MAF. If in doubt, search the forum for how to ! Good luck.

wat is an MAF?

**adamss24** · 26-12-2006,02:32 PM

Mass Airflow Meter a.k.a. airmass meter. Search the forum for details as its been discussed many times before ! Cheers.

**vaslam1986** · 26-12-2006,08:42 PM

Originally Posted by adamss24

Mass Airflow Meter a.k.a. airmass meter. Search the forum for details as its been discussed many times before ! Cheers.

Cheers adamss24, are there any other factors that could affect the fuel consumption so dramtically?

**adamss24** · 26-12-2006,09:01 PM

Originally Posted by vaslam1986

Cheers adamss24, are there any other factors that could affect the fuel consumption so dramtically?

Injectors but that will show like a workshop light and will make the car run verry poor and probably hard to start when cold ! Get it scanned and make a note of the fault codes then we will take it from there ! Good luck !

**RickT** · 27-12-2006,12:36 AM

Get the faults codes if you can first of all before buying a MAF as there not cheap.. and post your findings..

Cheers

RicKT

**andyroo** · 31-12-2006,09:53 PM

Hi
I bought a 53 plate A4 Avant 1.9 130 Multitronic beginning of August and am averaging 36 The best I've had was 40 on a run of approx 250 miles. The official figures show that the multitronic is no different from the manual so that is not to blame!! I've spoken to friends with the same motor and they all attain an average of mid 40's I've also accosted people on fourcourts and in car parks and they all say the same, mid 40's. I'm persuing this with the dealer I bought it from (a VW dealer) they've changed the MAF, this reduced the smoke output considerably but the fuel consumption has remained the same and the performance is no different

(pretty good for a 1.9). I've tried driving like a grandad and a lunatic the difference in fuel consumption was negligeable.Please keep us informed of your fidings it will be usefull to all.
Cheers
Andyroo

**vaslam1986** · 04-01-2007,02:59 AM

Originally Posted by andyroo

Hi
I bought a 53 plate A4 Avant 1.9 130 Multitronic beginning of August and am averaging 36 The best I've had was 40 on a run of approx 250 miles. The official figures show that the multitronic is no different from the manual so that is not to blame!! I've spoken to friends with the same motor and they all attain an average of mid 40's I've also accosted people on fourcourts and in car parks and they all say the same, mid 40's. I'm persuing this with the dealer I bought it from (a VW dealer) they've changed the MAF, this reduced the smoke output considerably but the fuel consumption has remained the same and the performance is no different

(pretty good for a 1.9). I've tried driving like a grandad and a lunatic the difference in fuel consumption was negligeable.Please keep us informed of your fidings it will be usefull to all.
Cheers
Andyroo

rite a finally ran diagnostics on the car and it showed the reason for the poor fuel econonmy as being the water temp sensor. Got that sorted for £50 (parts and labour) i was dreading it because i got told it maybe the fuel injectors and they're like £450+ from dealer.

Neways hope this helps