EM TuningSky Insurance
Results 1 to 9 of 9

Thread: Dropping MPG

  1. #1
    NineNails's Avatar
    Proud sponsor of the snack food industry

    Status
    Offline
    Join Date
    Sep 2006
    Location
    North Wales
    Posts
    577

    Dropping MPG

    Evenin all.
    Ok so I know the DIS is not that accurate but the average figure is on a downward trend from just over a constant 34 down to 32 and still slowly dropping. This is confirmed by me doing the same journeys every week with same driving style and having to fuel up a day earlier than normal.
    I scanned it the other week and got 'Lambda no activity intermittent'. I took the sparks out for a check and they seem fine with less than 10k on them.
    Is it likely to be a failing Lamda or could that code be thrown up by something else?
    Thanks for any help as always
    Si.
    2000 1.8t quattro Sport totally standard (ish)

  2. # ADS
    ADS
    Join Date
    Always
    Location
    Global
    Posts
    Many
     
  3. #2
    marktdisport's Avatar
    5th Gear

    Status
    Offline
    Join Date
    Jul 2011
    Location
    mids
    Posts
    1,193
    slowly failing maf possible have you used a ebay scanner or proper vagcom m8
    A4 TDI 130 SPORT..
    now sold but still in the family, gone back in time to the cupra R again..

  4. #3
    NineNails's Avatar
    Proud sponsor of the snack food industry

    Status
    Offline
    Join Date
    Sep 2006
    Location
    North Wales
    Posts
    577
    Proper vagcom mate. Just to add, engine is running very well and smooth just now too with no other issues. No fuel smell or anything like that.
    2000 1.8t quattro Sport totally standard (ish)

  5. #4
    S4_dan's Avatar
    Fire up the Quattro!

    Status
    Offline
    Join Date
    Jan 2006
    Location
    Somewhere in the Howardian Hills!
    Posts
    1,503
    I had poor MPG and lambda faults, so I replaced the lambdas with FAE items from ECP. Every couple of months my mpg drops, scan the car and lambdas showing no activity on bank 1 & 2, so clear the codes and the MPG returns to normal for a couple of months then it'll do it again for some reason?

    IF you're going to replace the lambda, buy a genuine Bosch item!

    Dan
    2002 2.5 V6 Quattro
    Mods Done: Q5 Rear aero wiper. Front ambient light install. Led number plate lens. Towbar with 13pin electrics.
    Mods to complete: Sport shocks to go with Eibach pro springs. Fit 17" 5 star matt black wheels. Fix lack of torque at low revs. Get a custom exhaust system fitted.

  6. #5
    "Stick a V8 in it!"

    Status
    Offline
    Join Date
    Jan 2008
    Location
    Glenrothes, Fife, Scotland
    Posts
    14,900
    Yeh its probably a lambda fault.

    I'm impressed you can get 34mpg from a quattro though, neither of mine will do anywhere near that. The missus usually does a lot of town driving and its lucky to get much above 24mpg typically. Mine does more motorway runs, but even then the best i've ever had was 32, and it typically returns just under 30. You can see the long term averages for both cars in my sig.

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
    1997 S4 - PPC £999 Challenge Track Car Build
    TD5 Land Rover Defender build


  7. #6
    audiv6quattro's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Dec 2010
    Location
    East sussex
    Posts
    392
    My dis shows I get between 9-18 mpg sometimes I'm lucky and get 220 mpg....... I think mines broke for some reason, but the average is allways the same 18mpg I've actually tested it if I put £15 fuel in I get around 50miles, really need to get it sorted but with it being a v6 there's 2 lambdas to buy so it'll have to wait, but yours does sound like a lambda issue, hope you get it sorted though

  8. #7
    1st Gear

    Status
    Offline
    Join Date
    Apr 2006
    Location
    A, A
    Posts
    269
    I wish mine showed what yours shows lol, I get 4.2 mpg if I plant it so I get 4.2 all the time ; )

  9. #8
    NineNails's Avatar
    Proud sponsor of the snack food industry

    Status
    Offline
    Join Date
    Sep 2006
    Location
    North Wales
    Posts
    577
    Thanks for the replies. I guess I better find me a Lambda then. A quick look found me Just Lambda, Suppliers of zirconia and titania lambda sensors by post but £78! For a proper Bosch one. Anyone know of Bosch for cheaper??

    I can't really comment on the fuel figures because I'm just going off the DIS but I don't think it's too far out. The last time I could afford to brim the tank so I could work it out properly I think it was indeed around the 34mpg figure but that was driving like a pussy and motorway miles mainly also.
    Cheers
    2000 1.8t quattro Sport totally standard (ish)

  10. #9
    audiv6quattro's Avatar
    2nd Gear

    Status
    Offline
    Join Date
    Dec 2010
    Location
    East sussex
    Posts
    392
    Hi mate someone on asn recommended this place to me Lambda Sensor | Audi A4 1.8000 2000 | BuyPartsBy , I cant for the life of me remember who but they seem very reasonably priced not to sure if they are bosch but give em ago. There's plenty on there to choose from

 

 

Similar Threads

  1. TDI 170 PD MPG - DIS / MPG accuracy? (pessimistic)
    By c_w in forum A3/S3/Sportback (8P Chassis)
    Replies: 19
    Last Post: 11th December 2010, 16:30
  2. Dropping an A4 B7 SE
    By stevehall in forum Awesome GTI
    Replies: 1
    Last Post: 5th August 2009, 17:05
  3. Dropping an SE
    By auroan in forum Audi S4/A4/A4 Cab (B7 Chassis)
    Replies: 15
    Last Post: 22nd December 2008, 11:05
  4. Boost dropping off?
    By Oranoco in forum A4/S4 forum(B5 Chassis)
    Replies: 2
    Last Post: 21st March 2008, 14:43
  5. just dropping by to say...
    By hollywoodheidi in forum Rants & Raves
    Replies: 0
    Last Post: 18th October 2007, 08:37

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Single Sign On provided by vBSSO

Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

Content Relevant URLs by vBSEO