Monster MotorsportChris Nott
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  1. #1
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    MAF fault with new Bosch MAF

    Hello people.

    i have a audi S3 from year 1999.
    i have this fault 16487 - Mass Air Flow Sensor (G70): Signal too high
    P0103 - 35-10 --- Intermittent
    Car smelled gasoline and Mass Flow g/s are too low.
    i bought a new bosch MAF and fasoline smell disappeared, air flow is good but car remains slow,
    fault 16487 remains.
    With maf disconnected the car is ok.
    log

    Group A: '002
    RPM Load Inj. On Time Mass Flow
    TIME
    Marker STAMP /min % ms g/s
    35.98 2120 14.3 1.64 7.69
    36.88 2160 23.3 2.46 10.39
    37.78 2240 44.4 4.10 19.72
    38.68 2320 35.3 5.33 28.11
    39.58 2360 22.6 2.05 8.72
    40.48 2360 22.6 2.46 10.47
    41.38 2360 40.6 3.69 17.75
    42.29 2400 48.1 5.74 29.64
    43.17 2520 111.3 11.89 56.69
    44.07 2760 145.1 15.99 79.97
    44.97 2920 191.7 20.91 116.94
    45.88 3240 159.4 17.22 103.17
    46.77 3480 162.4 17.63 116.00
    47.67 3760 163.2 17.63 123.19
    48.57 4000 167.7 18.04 137.17
    49.48 4240 165.4 18.04 142.64
    50.38 4480 168.4 18.04 151.75
    51.28 4680 168.4 18.04 161.25
    52.18 4920 169.9 18.45 167.81
    53.08 5160 191.7 21.73 194.89
    53.97 5360 191.7 21.73 195.75
    54.88 5560 187.2 21.73 199.44
    55.78 5720 182.7 21.32 200.25
    56.68 5880 178.9 20.50 200.31
    57.58 6040 174.4 20.50 201.92
    58.48 6160 170.7 20.09 200.25
    59.38 6240 168.4 19.68 201.25
    60.28 6360 164.7 19.27 201.00
    61.18 6480 162.4 19.27 201.08
    62.07 6560 158.6 18.45 200.31
    62.97 6640 157.1 18.45 200.06
    63.87 6720 154.1 18.04 199.42

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  3. #2
    <tuffty/>'s Avatar
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    Post screen shots in excel mate... those are pretty difficult to read

    <tuffty/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

  4. #3
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    maf off

  5. #4
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    maf em


  6. #5
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    Someone can help?!?!?!?

  7. #6
    epox's Avatar
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    Have you cleared the faults maf gs is 200 /8 = 250 bhp.

    What makes you think its faulty?
    S3 2003........REVO..........Stage 1...........218G/S.......÷..........°8..........=..........272bhp ......368Nm.....271 ft lbs

  8. #7
    <tuffty/>'s Avatar
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    I assume your car is mapped? 200 odd gs suggests it is as does the requested boost... MAF too high faults are normally the result of the airflow exceeding values in the table KFMLDMX... this is the table with diagnostic limits for airflow and is normally lifted a little and tuned cars although I have only seen this personally on big turbo tunes...

    If your car has extra mods to aid airflow (I don't know the spec of your car) then this could be part of the reason why this limit is being reached..

    <tuffty/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

  9. #8
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    the car is a s3 Apy 210hp form year 1999

    the car is mapped and have a conical filter.

  10. #9
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    Quote Originally Posted by epox View Post
    Have you cleared the faults maf gs is 200 /8 = 250 bhp.

    What makes you think its faulty?
    Yes, i clear faults several times.
    the car is too slow dont have 250bhp

  11. #10
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    People i already see all intake system.
    The maf connector is ok.
    but the car still runs faster with maf unplugged.
    With maf plugged the injection time is always above 20ms.

    need some help

  12. #11
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    Change the Bosch MAF for a genuine Audi MAF.

  13. #12
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    i already change MAF

  14. #13
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    I know but after reading various articles online, the Audi MAFs are the best and most aftermarket ones still provide false/incorrect readings.

  15. #14
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    the readings in all logs the g/s are ok,
    i will try with other maf

  16. #15
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    i have news.
    I miss a Pipe, the pipe from intake manifol to PCV has a big hole hole.

  17. #16
    RIP S3dave

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    air leaks?
    injested airflow looks kinda normal, but if you are down on power, I would be smoke testing it looking for leaks
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