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Running rich and temp

Discussion in 'A3/S3 Forum (8L Chassis)' started by Shug1874, Dec 1, 2008.

  1. Shug1874
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    Shug1874 Member

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    [Dec 1, 2008]
    Ran VAG-COM to see what the car was whining about now (abs sensor) and it also showed up this:

    Address 01: Engine
    Controller: 06A 906 032 BJ
    Component: 1.8L R4/5VT 0002
    Coding: 10710
    Shop #: WSC 06435
    WAUZZZ8LZ1A113700 AUZ7Z0A1809399
    4 Faults Found:
    16486 - Mass Air Flow Sensor (G70): Signal too Low
    P0102 - 35-10 - - - Intermittent
    17705 - Pressure Drop between Turbo and Throttle Valve (check D.V.!)
    P1297 - 35-00 - -
    17545 - Fuel Trim: Bank 1 (Add): System too Rich
    P1137 - 35-00 - -
    17704 - Error in Mapped Cooling System (usually temp Sensor or Thermostat)
    P1296 - 35-10 - - - Intermittent
    Readiness: 0000 0000

    Aside from needing a new DV, could the MAF be causing the fuel prob? I have noticed the mpg drop a little recently.
    With the cooling system, I've noticed the engine runs cooler, but given the temperature has been between 3 and -6 I didn't think there was a problem.
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  3. h100vw
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    h100vw Member

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    [Dec 1, 2008]
    That code gets thrown with boost leaks too. Assuming all the hose clips are done up the only place it could leak would be the DV. BUT that's not always the case.

    MAFs are funny things, intermittent airflow may cause it to run rich briefly. I would have a read of ross-tech.com about fuel trims. I can never remember which way round it is but there's 2 trim problems with different symptoms.

    Gavin


    save you looking

    http://www.ross-tech.com/vag-com/cars/fuel-trim.html
    #2
  4. AndyMac
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    AndyMac Moderator Staff Member Moderator

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    [Dec 1, 2008]
    Once warmed up your engine temp should always be the same (90 degrees) regardless of outside temp, that's what the thermostat & radiator fans are for.
    I'd replace the temp sender first as this is cheap at £20 from stealer and an easy DIY fix. This will be causing over fuelling with the ECU thinking the engine isn't up to temp.
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  5. Shug1874
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    Shug1874 Member

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    [Dec 1, 2008]
    Needed a bitty or two that vag parts sell so chucked in a temp sender too.
    Hopefully with DV that'll fix the probs.
    Then I just need to sort the abs sensor, steering angle sensor, and central locking pump and vacuum leak then my car will finally be normal!
    Tho its also due a service, and I suspect some bushes are on way out :wacko:
    Cheers for advice. :salute:
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