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  1. #1
    LSL
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    Luke

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    Need someone to look over data logs + help with boost surge issue

    Hey, I was told to do some data logs to help figure out my boost surge issue so here they are, I'd be very grateful if someone that knows there stuff has a look over them!

    The problem I'm having is it appears once a certain boost pressure is reached it dumps, then boosts back up again, it keeps doing this all the way up the rev range. It does it under part throttle too.
    I also checked the adaptions as they can show leaks, they were 0% short term and -1.6% long term.

    I done 2 runs for each of the groups all in 3rd gear.


    Group A: '002 Group B: '020 Group C: '115
    Engine Speed Engine Load Injection Intake Air Mass Cylinder 1 Ignition Cylinder 2 Ignition Cylinder 3 Ignition Cylinder 4 Ignition Engine Speed Engine Load Charge Pressure Charge Pressure
    TIME Timing TIME Angle Delay Angle Delay Angle Delay Angle Delay TIME (specified Value) (actual Value)
    STAMP /min % ms g/s STAMP CF CF CF CF STAMP /min % mbar mbar
    9.43 720 23.3 2.72 3.25 9.83 0 0 0 0 8.93 720 22.6 980 980
    41.21 1880 81.2 9.52 33.89 40.4 0 0 0 0 40.81 1760 51.9 1570 970
    42.62 2440 142.9 16.32 71.11 41.71 0 3 0 3 42.22 2280 123.3 1690 1560
    43.91 3120 112 14.62 93.14 43.02 0 3 3 6 43.51 2920 110.5 1620 1600
    45.13 3680 160.2 18.7 128.47 44.33 6 5.3 6 6.8 44.73 3520 106.8 1560 1310
    46.33 4360 154.1 20.06 126.17 45.53 6 5.3 6 6.8 45.93 4080 133.8 1630 1740
    47.55 4800 152.6 21.08 140.17 46.75 5.3 5.3 5.3 6 47.15 4600 152.6 1640 1980
    48.86 5360 152.6 23.46 154.89 47.96 5.3 3.8 5.3 6 48.44 5200 154.1 1640 1940
    50.17 5840 140.6 21.76 156.72 49.35 4.5 3 4.5 9 49.77 5680 138.3 1630 1760
    51.37 6280 121.8 18.02 146.06 50.57 4.5 3 7.5 8.3 50.97 6160 123.3 1570 1580
    73.09 1800 13.5 0 4.81 72.18 0 0 0 0 72.58 1840 13.5 980 990
    201.82 1800 25.6 4.76 17.86 202.32 0 0 0 0 201.43 1800 18.8 980 980
    203.14 2280 118 12.92 57.25 203.54 0 0 0 0 202.72 2080 101.5 1720 1270
    204.34 2960 160.9 18.36 88.61 204.74 0 0 0 0 203.94 2720 156.4 1690 2000
    205.55 3640 113.5 12.92 49.19 205.95 0 0 0 0 205.14 3400 160.2 1620 1960
    206.85 4320 105.3 12.24 87.14 207.26 0 0 3 6 206.45 4120 154.1 1650 2300
    208.06 4920 124.1 15.64 113.17 208.56 0 0 6 5.3 207.67 4720 139.8 1640 1770
    209.37 5560 129.3 17.68 134.92 209.77 0 3 6 5.3 208.96 5360 136.8 1650 1700
    210.57 6080 124.8 17.68 145.58 210.99 0 3 5.3 4.5 210.17 5880 127.8 1590 1580


    Group A: '003 Group B: '020 Group C: '118
    Engine Speed Intake Air Mass Throttle Drive Ignition Cylinder 1 Ignition Cylinder 2 Ignition Cylinder 3 Ignition Cylinder 4 Ignition Engine Speed Intake Air Charge Pressure Charge Pressure
    TIME Angle Sensor 1 Timing Angle TIME Angle Delay Angle Delay Angle Delay Angle Delay TIME Temperature Solenoid Valve (actual Value)
    STAMP /min g/s % °ATDC STAMP CF CF CF CF STAMP /min °C % mbar
    78.54 1800 31.78 100 12 77.64 0 0 0 0 78.03 1720 20 95.3 1000
    79.74 2240 57.11 100 9 78.94 0 0 0 0 79.34 2080 17 95.3 1390
    80.96 2920 52.92 29.4 10.5 80.14 0 3 0 5.3 80.54 2680 15 54.9 2020
    82.26 3520 64.06 76.9 19.5 81.46 0 3 0 4.5 81.86 3320 15 0 2280
    83.57 4120 129.72 94.5 10.5 82.66 0 2.3 0 4.5 83.07 3920 15 0 1700
    84.91 4680 126.97 99.6 10.5 83.98 0 2.3 6 3.8 84.38 4480 16 69.4 1370
    86.1 5240 140.17 99.6 15.8 85.28 0 2.3 6 3.8 85.68 5080 18 64.3 1580
    87.49 5840 142.47 100 21 86.59 0 1.5 5.3 3 87.09 5680 22 63.1 1630
    88.7 6240 143.92 100 23.3 87.9 0 0.8 4.5 3 88.3 6120 24 62.7 1580
    194.09 1720 4.36 2.4 14.3 194.49 0 0 0 0.8 193.7 1760 17 0 990
    195.41 2040 43.78 100 14.3 195.8 0 0 0 3.8 194.91 1840 17 95.3 1100
    196.72 2720 87.94 100 3 197.12 0 0 0 3.8 196.32 2480 14 66.7 1760
    197.92 3440 124.36 96.9 8.3 198.33 0 0 0 3 197.52 3200 12 74.9 1380
    199.24 4160 81.64 29.8 11.3 199.64 0 0 3 3 198.83 3920 12 60.4 1890
    200.44 4760 85 42.4 20.3 200.84 3 3 3 7.5 200.04 4560 15 49.8 2090
    201.76 5440 130.47 100 14.3 202.25 3 5.3 5.3 7.5 201.24 5160 18 53.7 1960
    203.05 6000 158.94 100 13.5 203.47 2.3 5.3 5.3 6.8 202.65 5800 21 66.7 1810
    204.36 6440 103.47 80.8 8.3 204.88 0 0 0 0 203.96 6320 26 33.3 1450

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  3. #2
    www.badger5.co.uk

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    its over boosting from request so ecu is cutting it...
    pulling a lot of timing also.

    N75 failing or split pipe associated with its pipework?

    unmapped from the boost requests.

    fault codes expected to see with this would be charge pressure maximum exceeded type code..
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  4. #3
    Sixty 9 GP's Avatar
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    What would be the major cause for the car to pull timing?
    <img src=http://i616.photobucket.com/albums/tt241/Sixtysa3/IMG-20121018-00252_zpsf231ff02.jpg border=0 alt= />

  5. #4
    www.badger5.co.uk

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    too much boost for starters... its overshooting request
    oily charge pipe from pcv malfunction... check throttle body for oil dribbling out

    I would be looking at why its over boosting first and fixing that
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  6. #5
    LSL
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    Thanks for the reply Bill! I checked all the pipework the other day and couldn't see any splits so I'll grab a new N75, it hasn't been throwing any fault codes though...

    Also I've recently cleaned the TB and done away with the PCV system, there was no excessive oil then so I doubt that's causing any problems.

 

 

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