after a day on the tools yesterday, changing the passenger side lambda sensor i thought it prudent to go for a drive this morning and check everything was ok. ive not really used VCDS in anger before, aside from re-coding the RNS-E when i upgraded the stereo it has just sat there.
today, that changed. and my one word review is: "WOW".
the things you can monitor and log (not just with the engine!) are amazing
this is 0-100kph run whilst logging some of the transmission parameters:
Code:
4D0 927 156 DG AG5 01L 4.2l5V RdW 0708
Group A: 001 Group B: 002 Group C: 003
Engine RPM Input RPM Output RPM Trans. Gear Actual Program Throttle value Trans. Output RPM Trans. Gear Brake Light Switch Shift Solenoid Vehicle speed Voltage Supply
TIME G182 (0-8200) G195 (0-8200) TIME DS/WL/AS/TP/GR % of WOT G195 (0-8200) TIME Km/hr Tmnl 15 (10-16v)
Marker STAMP /min /min /min STAMP % /min STAMP km/h V
48.53 672 0 0 1m 48.81 DS 15.6 0 1m 49.09 PN Inactive 0 13.7
49.38 1728 576 160 1m 49.65 DS 100 288 1m 49.93 PN Inactive 12 13.76
50.22 2688 2208 608 1m 50.49 DS 100 736 1m 50.78 PN Inactive 26 13.95
51.06 4000 3776 1056 1 51.33 DS 100 1184 1 51.62 PN Inactive 40 13.63
51.89 5440 5248 1472 1 52.18 DS 100 1600 1 52.46 PN Inactive 52 13.82
52.75 6688 6528 1824 1 53.02 DS 100 1888 1 53.3 PN Inactive 64 13.7
53.59 5664 5440 2112 1 53.86 DS 100 2176 1 54.15 PN Inactive 72 13.5
54.43 5440 5216 2368 1 54.71 DS 100 2432 1 54.99 PN Inactive 80 13.7
55.26 5984 5760 2624 1 55.55 DS 100 2688 2 55.83 PN Inactive 90 13.38
56.11 6528 6304 2848 2 56.39 DS 100 2944 2 56.67 PN Inactive 96 13.57
56.96 6976 6784 3072 2 57.23 DS 100 3136 2 57.52 PN Inactive 104 13.44
57.79 5120 4928 3264 2 58.08 DS 100 3328 2 58.36 PN Inactive 110 13.63
58.63 5280 5152 3424 2 58.92 DS 100 3488 2 59.2 PN Inactive 116 13.44
59.48 5472 5408 3584 3 59.76 DS 100 3648 3 60.05 PN Inactive 120 13.38
60.32 5696 5632 3744 3 60.6 DS 100 3808 3 60.89 PN Inactive 126 13.63
61.16 5568 5600 3776 3 61.45 DS 0 3712 3 61.73 Brakes PN Inactive 120 13.82
62 4064 4000 3520 3 62.29 DS 0 3424 4 62.57 Brakes PN Inactive 112 13.95
62.85 3168 3200 3200 4 63.13 DS 0 3104 4 63.42 Brakes PN Inactive 102 14.02
and 0-100kph monitoring the lambda sensors. the run starts at 65.4 seconds.
what i think i am seeing is the lambda sensors going into closed loop mode when doing WOT runs, where the ecu relies on pre-programmed settings instead of using the feedback loop. when i lift off at 75.8 seconds. feel free to pass comment
Code:
ADVMB 4.2L V8/5V G 0003
G001 G001 G005 G005
TIME Group 1 - Field 2 Group 1 - Field 3 Group 5 - Field 0 Group 5 - Field 2
STAMP O2 Sens Bank1 - +/-10%(>2% flct) O2 Sens Bank2 - +/-10%(>2% flct) Engine Speed - RPM Vehicle Speed - km/h
% % /min km/h
48.29 -0.8 0 680 8
49.19 1.6 -2.3 680 5
50.09 3.9 -0.8 640 3
50.99 0.8 -3.1 680 1
51.89 4.7 0.8 680 0
52.79 1.6 -2.3 680 1
53.69 2.3 0.8 1400 5
54.59 -4.7 -5.5 1880 12
55.5 -3.1 -3.9 2080 19
56.39 6.3 7 1360 21
57.29 7.8 8.6 1040 18
59.09 3.1 3.9 680 3
59.99 0 1.6 680 0
60.89 -2.3 -0.8 680 0
61.79 -5.5 -3.9 1120 0
62.69 -6.3 -5.5 760 0
63.59 -8.6 -7.8 680 0
64.49 0 0 1560 0
65.4 0 0 2720 14
66.38 0 0 4240 32
67.5 0 0 5960 49
68.56 0 0 6320 66
69.65 0 0 5520 78
70.77 0 0 6240 89
71.88 0 0 6880 100
72.91 0 0 5080 107
73.94 0 0 5280 114
74.9 0 0 5040 117
75.8 -1.6 -4.7 3000 108
76.7 -5.5 -3.1 2680 96
77.6 0 0 1880 86
78.5 0 0 1840 81
79.41 0 0 1800 79
80.3 0 0 1760 77
81.2 0 0 1680 75
82.1 0 0 1640 73
aaaand finally, another 0-100(ish) but this time logging the throttle pedal sensor, ignition timing and airflow meter (in grammes of air per second).
Code:
TIME RPM g/s Throttle Ign.Timing
47.47 1600 70.97 16.9 21.8
48.59 3280 112.5 100 -4.5
49.59 4960 181.14 100 22.5
50.69 6600 238.92 99.6 19.5
51.89 5040 164.22 100 6.8
53.08 5760 209.14 100 27.8
54.18 6440 246.31 100 27.8
55.44 6720 273.36 100 5.3
cool stuff
if i had this level of insight into my racecar, i would be in heaven!
