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  1. #1
    6th Gear

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    Audi A3 TDI - Using fuel

    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.
    Atlas Grey A4 2.5 TDI Quattro Sport.
    Mods so far: Cruise control, DIS, Heated Mirrors, Tuning box, Xenonx, Centre Arm Rest, MFSW, RNS-E, SDS and Aero Wipers.
    To do: None yet.
    Next: Auto dip rearview mirror and Folding Mirrors.

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  3. #2
    Fahim's Avatar
    1st Gear

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    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?
    Things to do: Lower on coilovers, spacers, front end respray and a full correctional detail!

  4. #3
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    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.
    Atlas Grey A4 2.5 TDI Quattro Sport.
    Mods so far: Cruise control, DIS, Heated Mirrors, Tuning box, Xenonx, Centre Arm Rest, MFSW, RNS-E, SDS and Aero Wipers.
    To do: None yet.
    Next: Auto dip rearview mirror and Folding Mirrors.

  5. #4
    6th Gear

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    Took it for a drive without the maf, and it was totally gutless.
    Atlas Grey A4 2.5 TDI Quattro Sport.
    Mods so far: Cruise control, DIS, Heated Mirrors, Tuning box, Xenonx, Centre Arm Rest, MFSW, RNS-E, SDS and Aero Wipers.
    To do: None yet.
    Next: Auto dip rearview mirror and Folding Mirrors.

  6. #5
    sulaiman's Avatar
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    Seems good to me, I get 37mpg around town, 45mpg on the motorway.

    A3 TDI Sport

  7. #6
    6th Gear

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    Quote Originally Posted by sulaiman View Post
    Seems good to me, I get 37mpg around town, 45mpg on the motorway.
    My 2.5 tdi quattro is doing 45 on the motorway!
    Atlas Grey A4 2.5 TDI Quattro Sport.
    Mods so far: Cruise control, DIS, Heated Mirrors, Tuning box, Xenonx, Centre Arm Rest, MFSW, RNS-E, SDS and Aero Wipers.
    To do: None yet.
    Next: Auto dip rearview mirror and Folding Mirrors.

  8. #7
    HerefordQuattro's Avatar
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    Quote Originally Posted by BlackQuat View Post
    My 2.5 tdi quattro is doing 45 on the motorway!

    bloody hell wish mine did!
    A6 Avant 2.5tdi Quattro Sport 220bhp 458Nm 6 speed Manual

  9. #8
    swarcup's Avatar
    5th Gear
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    **** me too!!!!!
    2.5tdi Avant Q S 180 - 19" RS6 reps - chrome mirrors - ambient light package - cruise and dis retrofit - chrome side repeaters - front sline lowr conversion with cupra r splitter - rear lower valance with twin cut outs and exhaust tips - rs4 rear antiroll bar - puddle and footwell lights - sline door blades - fully colour coded - b8 autodimming mirror on custom window adapter - geuine aero wiper upgrade - genuine heated mirror upgrade

  10. #9
    6th Gear

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    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.
    Atlas Grey A4 2.5 TDI Quattro Sport.
    Mods so far: Cruise control, DIS, Heated Mirrors, Tuning box, Xenonx, Centre Arm Rest, MFSW, RNS-E, SDS and Aero Wipers.
    To do: None yet.
    Next: Auto dip rearview mirror and Folding Mirrors.

  11. #10
    6th Gear

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    Do these tell you anything? I'm not sure if that's normal
    Atlas Grey A4 2.5 TDI Quattro Sport.
    Mods so far: Cruise control, DIS, Heated Mirrors, Tuning box, Xenonx, Centre Arm Rest, MFSW, RNS-E, SDS and Aero Wipers.
    To do: None yet.
    Next: Auto dip rearview mirror and Folding Mirrors.

 

 

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