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Thread: Help reading a log..

  1. #1
    New User
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    Help reading a log..

    Hey guys - new here. I'm trying to investigate if I'm running into any fueling issues...no codes and no running issues so far (car is stock), but I ran over some debris on the road and pinched both hard fuel lines under the car. The smaller ID line (5/16") - assuming return - was fully crushed and I have cut it off and repaired temporarily. The larger ID (3/8" or 10mm) feels crimped pretty hard as well but obviously car is running....I've put 10-15 miles which also includes some hard pulls in 2nd and 3rd gear to test and eventually log it.

    I didn't realize but sampling rate is pretty weak unless I'm doing something wrong. In any case, I'm using HEX+CAN cable. Car is 2014 S5 3.0T. I just want to make sure I don't cause some further damage before I replace the line - none in country, Audi has to order from Germany so 10-15 days min. Haven't had a chance to read up on HPFP operation, specs on pressures and how it all works together so I did my best to log what I thought mattered here. I used to run standalone on my old track car so somewhat familiar with data logging and reading results, but when I know what to expect.

    Here's a 3rd gear pull full throttle. Not sure if I can upload actual sheet somehow??

    1/ STAMP:
    2/ Engine speed:
    3/ Coolant temperature:
    4/ Throttle valve position (absolute):
    5/ Exhaust temperature 1 bank 1:
    6/ Exhaust temperature 1 bank 2:
    7/ Fuel rail pressure: specified:
    8/ Actual fuel rail pressure:
    9/ Actual - Spec
    10/ Fuel pump: activation:
    11/ Fuel pump: actual fuel pressure:
    12/ Fuel regulating valve: duty cycle:
    13/ Fuel supply system: high-pressure regulator

    1 2 3 4 5 6 7 8 9 10 11 12 13
    /min C % C C hPa hPa Diff % hPa % hPa
    0.12 1671 101 22.7 613.5 615.5 55,906 51,772 (-4,134) 8.3 5,485 22.1 4072.91
    1.52 1927 101 29.8 632.3 636.5 77,237 66,212 (-11,025) 28.7 4,882 47.2 2594.98
    2.92 2364 101 76.1 694.7 710 83,623 84,510 886 34.0 4,988 42.4 -3311.4
    4.29 2914 101 85.5 789.5 802.6 91,438 89,084 -2,354 36.3 4,994 47.6 -3022.18
    5.72 3549 101 85.5 865.4 875.1 105,949 105,190 -759 39.5 4,925 52.1 5614.51
    7.12 4160 101 85.5 919.3 927 109,565 109,265 -300 41.7 4,994 54.8 -1114.41
    8.51 4726 102 85.5 958.2 961.3 110,000 113,208 3,208 44.7 4,715 60.5 289.21
    9.89 5305 102 85.5 971.4 973 112,187 111,377 -810 49.0 4,874 61.0 830.5
    11.29 5850 102 85.5 980.3 980.4 114,999 115,103 104 51.1 4,893 58.6 -3383.04
    12.67 6353 102 85.5 987.2 988.5 39,368 107,726 68,358 32.8 6,729 6.8 -1159.52
    14.04 4649 102 26.3 1000.1 999.3 37,545 35,247 -2,298 21.2 7,220 0.0 3966.77
    15.42 4329 101 25.5 994.5 990.9 35,797 41,435 5,638 20.9 7,334 0.0 -1889.2

  2. #2
    Verified VCDS User PetrolDave's Avatar
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    It would help if you could post a full unedited VCDS Auto-Scan, to identify the hardware & software versions of the modules fitted to your car.

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