Audi A4 B6 1.9 TDi poor fuel economy !

[Stefan Paiu]

yeah, I don't drive it hard at all. However, I'm interested to know if there are any members around Birmingham with a model like mine ( A4, 1.9TDI, 2003, manual, 100Bhp) and what consumption do they get around town.

[HalfAudio]

Listen, I drive such engine for 5 years and i got 211000 miles on it. i have done 100000 miles since i bought it. 50mpg urban and 40-45 mpg city it all depends from weather,road condition and understanding your cars soul (engine) Since i bought it i have just trashed it till red line whit nearly every gear. I had my turbo off, inlet manifold and exhaust manifold, how do you think was it clogged whit carbon deposits or anything else ? NO! just cleaned turbo a bit so it doesn't stick (just in case) and that's it. If you want your diesel to last then don't drive like a granny. It is healthy to shift after 2000rpm otherwise you will spoil your engine including inlet manifold and EGR. And dont listen in to the bulls**t that turning radio and air con off will save your fuel. At least it doesn't happen whit this engine and car. Driving in city mainly on 4th gear you don't need to **** in 5th gear.

1Clean your EGR if its clogged up

2Change filters and oil every 8 months or so (use same oil don't switch brands and viscosity) Genuine vw oil costs 30 quid per 5l and that all you need don't buy long lasting oil. DON'T EVER LET IT DROP LOW other vise you will end up filling it up every now and then. Learned from my mistake a year a go...

3When you change your cam belt make sure you change your thermostat, water pump and if you just bought it just for the sake change cooling sensor as well. If you loose coolant check your coolant servo as it may have a crack underneath it (you might not even notice it until you have removed it. AND if engine temperature is low try to use more water and less coolant concentrate. Speaking about this make sure there is no water in battery area!!! cant stress it enough.. clean your drain holes other wise you will end up whit faulty servo. DOnt forget to change the brake fluid and same goes for clutch pedal as they share the same fluid.
AND if you ever get a braking problem and they are not calipers worn/damaged brake rotors/pads or worn flex i brake pipes then first try to check vacuum hoses as they can be damaged or even collapse inside.

4Check that tyres are good and pressure is ok might help whit alignment adjustment (not just check as most garages do) they just rob u for printing a paper sheet and wiggling the car a bit.

5Check and clean all the ground points for battery and engine.

6And finally make sure you have no boost leak or fuel leak this can impact not only four overall performance but mpg as well
There i a quite common thing for a Tandem/Vacuum pump to leak a good new set of rubber and steel gasket will fix this and for better vacuum you can put new rubber hoses and clamps.

7Don't use KN performance air filter as it can and probably will in time kill your mass air flow sensor.

I hope this helps and you have a healthy engine.