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MAF problem

Discussion in 'A3/S3 Forum (8L Chassis)' started by markyp2002, Dec 13, 2006.

  1. markyp2002
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    markyp2002 Member

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    [Dec 13, 2006]
    Ok ive had the car on VAGCOM and found out my MAF is faulty.

    Bought a new sensor from GSF Car parts 38+vat and fitted it just.

    Turned the car on and it ticked over fine, as soon as i touched the accelerator there was a 2 second delay before anything happen then it coughed and spluttered up the revs and back down.

    checked again on VAGCOM and it was misfiring with the new MAF on.

    put the old one back on, still had the inital MAF problem the coughing and spluttering stopped.

    someone help me out here please?
    #1
  2. Olly_K
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    Olly_K Administrator

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    [Dec 13, 2006]
    i might be wrong, but that sounds mighty cheap for a MAF. Mine was about £80. Sounds like you have 2 faulty mafs
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  3. markyp2002
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    markyp2002 Member

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    [Dec 13, 2006]
    grrr the robbing bastards. Its an audi specialist i got it from too

    im going to have do some "persuading" to get my money back later.

    its not a bosch part, but its got the VW part number on it!

    will it be safe to unplug my MAF for now til i get the proper part?
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  4. Olly_K
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    Olly_K Administrator

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    [Dec 13, 2006]
    you can run the car with it unplugged, in fact, take it for a drive with it unplugged and see if your problems disappear.

    It's not uncommon to get faulty replacement MAFs
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  5. markyp2002
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    markyp2002 Member

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    [Dec 13, 2006]
    ok cheers mate, it does run better without the MAF on ive run it before, revs are better too.

    What difference would it make if i stuck an RS4 MAF on?

    The cars been remapped so would it make any difference?
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  6. Olly_K
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    Olly_K Administrator

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    [Dec 13, 2006]
    remapping shouldnt make a difference, are you running a standard air filter setup ? I know oil'd filters can screw the MAF, and as far as im aware a MAF is a MAF, and RS4 one would do the same thing just as if you were to stick yours on an RS4
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  7. rodenal
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    rodenal Active Member

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    [Dec 13, 2006]
    You also need to watch the audi mafs are sometimes from different manufacturers, the bosch ones are rubbish and break, lots. For some reason my car has a Hitachi maf which i found a nightmare to get a replacement for

    It didnt run right at all with a bosch one on so maybe just check who made the original u've got, better off searching for a new one by part number than by the car vin.

    Then again, as said its not uncommon to get a broken one as a replacement- get a friend with an audi to plug his in maybe?
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  8. markyp2002
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    markyp2002 Member

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    [Dec 13, 2006]
    ok cheers for that, im gonna have to sort this out pretty sharpish, it didnt like the other MAF i got which was cheaper, so im gonna have to fork out the £80 for the bosch one, i know you say they are **** but thats what ive got on there at the moment..

    ive also got this from VAGCOM

    its slightly worrying

    Address 01: Engine
    Controller: 06A 906 032 HJ
    Component: 1.8L R4/5VT 0002
    Coding: 11500
    Shop #: WSC 13622
    WAUZZZ8L221000849 AUZ7Z0A1883208
    1 Faults Found:
    17705 - Pressure Drop between Turbo and Throttle Valve (check D.V.!)

    Readiness: 0000 1001
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  9. markyp2002
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    markyp2002 Member

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    [Dec 13, 2006]
    hmmm i think i know what it is, if the MAF is giving a low or false reading the air is passing through the turbo and DV to the throttle body (another sensor there somewhere) which is reading higher the correct air intake giving me that fault.

    anyone shed any light on this? am i right in assuming this?
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  10. rodenal
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    rodenal Active Member

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    [Dec 13, 2006]
    Might need a new DV, i would take it one step at a time tho, get ur working maf, clear all the codes then check again after its ran for a bit
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  11. markyp2002
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    markyp2002 Member

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    [Dec 13, 2006]
    i only fitted a new DV like 2 weeks ago! bought that from audi dealership near me, if its faulty its going back :D

    ill change the MAF first see if i still get problems.

    thanks for the help anyway guys!
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  12. Olly_K
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    Olly_K Administrator

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    [Dec 13, 2006]
    no probs, im pretty sure you'll cure your problems with a new MAF.
    Not sure about the VAGCOM problem, but post it in the VAGCOM section and the nice chaps at ross-tech (or anyone else with good knowledge of it) will be able to help
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  13. chrisb
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    chrisb Member

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    [Dec 17, 2006]
    There were problems with Bosch MAFs at one time, but they seem to be cured now. I replaced the MAF on my TDI with a Bosch for about £80 form ECP, and it transformed it. I'd steer clear of the cheapy replacements.
    #13
  14. Pete69zx
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    Pete69zx Guest

    [Dec 18, 2006]
    Yep, i also agree with steer clear of cheapie replacement MAF's.

    This is according to my Audi Specialist mechanic :)
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