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Thread: real bad mpg

  1. #1
    :: blade ::'s Avatar
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    real bad mpg

    Ok need some help guys. its doing my head in now and im close to getting rid and getting my celica back out. getting about 66miles to £20 which is shocking. thats around town driving like a granny. should be getting more than that surely. serviced it last week. checked for leaks amd i cant find any. not a clue what to do. cant get it on vag com as theres no one near me to put it on

    Help as i dont want to get rid :,(

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    Is it warming up fairly quick, maybe the 'choke' is staying on.
    Dave
    2001 S3 | 210/256/270 switchable APR software | Absolute Red |

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    :: blade ::'s Avatar
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    Its takes about 5/10 mins to warm up

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    I was getting around the same before I got mine thoroughly checked out and sorted about 1 and a half years ago.

    New MAF, 02 sensor, SAI deleting/removal, replacing one of the split pipes under the manifold and finally a service sorted my V power drinking problem out.

    I'm not saying to change all of the above - but those sort of areas are where I'd be checking and taking logs from if and when you can get to a VCDS.

    (Have a look on the VCDS members map on here and throw a few PMs out to some people offering some beer tokens and you may be able to get a quick scan and some logs taken at the weekend)
    2000 S3 APY

    18" BBS RSII with Michelin PS3s, 20mm H&R adapters, Relentless 3" DP and Sports cat, B5 V1 induction kit, cone filter+heat shield, Forge 007P, Awesome GTI SMF, AP coilovers, Facelift rear lights, Full Powerflex poly bush kit, R32 Rear ARB, SAI delete, N249 by-pass, Upgraded Engine mounts with Polytek, Stage 1 CC at Badger 5.

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    get yourself onto ebay and buy one of these , Interface V1.5 ELM327 OBDII OBD2 Diagnose Bluetooth Auto Car Diagnostic Scanner | eBay,

    then install this on your phone , its free , https://play.google.com/store/apps/d...n.obdcardoctor

    then bring up the fuel trim graph and work from there , cheep option .

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    Ive got a small bluetooth scanner thing which i use for torque so should work for that app car doctor app. just donloaded it. theres a guy round the corner from me who has it but hes quite hard to get hold of sent him texts abd pms and heard nothing back so going to have to find some mo ey from somewhere and take it to a garage.

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    get it scanned, might be something like a dodgy EGT sensor. I had this and the car just dumps fuel into the engine as a precaution meaning your mpg just plummets

    and check the VCDS users map

    https://maps.google.co.uk/maps/ms?ms...bed&dg=feature

    looks like FactionOne should be pretty close to you
    Alex S3 AMK
    Bilstein B8s, H&R Springs, Neuspeed ARBs, Genuine 18" BBS LMs & LCR Brembos

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    :: blade ::'s Avatar
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    Faction one is the closest but cant get hold of him. he plugged my car in a few months ago

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    Quote Originally Posted by jimmcgee View Post
    get yourself onto ebay and buy one of these , Interface V1.5 ELM327 OBDII OBD2 Diagnose Bluetooth Auto Car Diagnostic Scanner | eBay,

    then install this on your phone , its free , https://play.google.com/store/apps/d...n.obdcardoctor

    then bring up the fuel trim graph and work from there , cheep option .
    does torque scan show any codes , cos I know it shows my fault code .

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    Quote Originally Posted by jimmcgee View Post
    get yourself onto ebay and buy one of these , Interface V1.5 ELM327 OBDII OBD2 Diagnose Bluetooth Auto Car Diagnostic Scanner | eBay,

    then install this on your phone , its free , https://play.google.com/store/apps/d...n.obdcardoctor

    then bring up the fuel trim graph and work from there , cheep option .
    This in the link gonna fit as there's no mention of Audi in the compatibility list
    Last edited by Jinxy-S3; 14th March 2014 at 16:19. Reason: Cause I can :)

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    checked for fault codes on torue and car doc and nothing has come up, done a fuel check and bank 1 i think it was and it wasnt steady at idle, it was going from -5 to +8 on the graph, is that right? or should it be steady?

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    Does it idle ok or does the rpm rise and fall?
    Alex S3 AMK
    Bilstein B8s, H&R Springs, Neuspeed ARBs, Genuine 18" BBS LMs & LCR Brembos

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    :: blade ::'s Avatar
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    idle seems to be fine, has a slight cough but its hardly noticable and doesnt do it all the time

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    Jinxy , thats the one I use in my a4 and it works fine , and the wifes 2011 tt and my mates 2001 passat , so yes it works ,


    Blade , you should have a short term fuel and long term in torque , mine sites at +- 5 on short and 0 on long term .
    Jinxy-S3 likes this.

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    What's the fueling like if you unplug the maf at idle?
    Alex S3 AMK
    Bilstein B8s, H&R Springs, Neuspeed ARBs, Genuine 18" BBS LMs & LCR Brembos

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    :: blade ::'s Avatar
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    not a clue, will check on monday dont get to drive it all that often at the mo so wil do some more checks monday and see whats what then with it

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    Quote Originally Posted by jimmcgee View Post
    Jinxy , thats the one I use in my a4 and it works fine , and the wifes 2011 tt and my mates 2001 passat , so yes it works ,


    Blade , you should have a short term fuel and long term in torque , mine sites at +- 5 on short and 0 on long term .
    Sweet mate cheers

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    still going bad , going to be getting a smoke test done at the end of the month hopefully, but there not cheap been quoted £45+vat for it to be done, hopefully it will bring up multipul leaks to warrent the bad mpg, if not im going to be even more confused

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    Watching this closely,
    Mine has been terrible lately, new stat improved things but it's still not great and I have no codes coming up on vcsd,
    Not really sure what mpg I should be expecting though.

  21. #20
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    i was hoping around 30+ tbh but getting nowhere near that

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    Dont want to upset you but ye i get roughly 32mpg mixed driving. Mapped S3 with tip filter etc.

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    thats not going to upset me 32mpg mixed driving will be fine, mines not mapped yet either, so with it being mapped and stuuf will be fine, mines barely making 22mpg around town driving like a granny

  24. #23
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    Town driving is never going to be that economical in a 1.8T. Short journeys, cold starts etc etc.
    I average about 23 around town, but easily see 35 on the motorway.
    '01 Facelift S3. CC'd by the Badger

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    :: blade ::'s Avatar
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    when i 1st got the car it was doing near on 100-120 miles to £20 tho, and thats halved in 6months, so surely theres something wrong like i said its going into revo at the end of the month for a smoke test and see what happens then

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    Fuel trim long term is at 0.78% short term is at +6.25%

  27. #26
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    Have you reset the adaptions or had the battery off recently? as the readings are well within the tolerances...

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    :: blade ::'s Avatar
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    nope, not had the battery off, short term was bouncing from -3 up +6, is it supposed to be steady?

  29. #28
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    What is the average mpg for our s3 at this age . Mine seems to drink fuel faster than I can down a Stella . I only get about 23mpg on short journeys but on the m-way it's a lot lot better . My a4 b5 1.8t does 35mpg on short journeys . Seems like hell of a difference but the a4 is a lot lighter and isn't driving all 4 wheels . The s3 is a heavy little car compared to the a4 .

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    im only getting 17.6 mpg and does not move from that in my s3

 

 

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