Interpreting Data Logs

[Ellisium]

OK, I dug out my 'dumb' interface cable which I used on my old A3 1.8T Sport as I needed to clear the 'camshaft position sensor' fault on the dash.

I thought I would have a go at logging some data as I have seen a few threads using this information to help show any areas of concern or possible improvement.

I have only logged measuring block 002 but don't really understand the results i.e. is there anywhere I can compare my results with 'expected' results?

My results are displayed below but which other measuring blocks should I also look at recording?

Friday 1 April 2011 15:17:57
1ML 906 032 A 1.8l R4/5VT 0001

Group A: '002
RPM Load Inj. On Time Mass Flow
TIME
Marker STAMP /min % ms g/s
0 2120 69.9 8.84 37.39
0.48 2200 87.2 7.48 41.67
0.9 2280 98.5 8.84 47.53
1.41 2400 112.8 10.2 55.47
1.9 2520 126.3 11.9 65.56
2.3 2600 137.6 13.26 74.75
2.82 2760 158.6 15.64 93.44
3.31 2920 191 19.38 121.86
3.71 3160 191.7 22.44 154.89
4.11 3240 191.7 22.78 141.92
4.51 3440 191.7 20.74 140.31
4.93 3520 191.7 20.74 134.22
5.33 3680 191.7 20.06 135.56
5.73 3800 191.7 21.42 153.06
6.13 3960 191.7 21.76 150.42
6.53 4120 191.7 21.76 165.28
6.93 4320 191.7 21.76 160
7.34 4400 191.7 20.74 165.28
7.84 4520 191.7 22.1 174.92
8.24 4600 191.7 21.76 165.28
8.64 4760 185 20.74 158.44
9.04 4920 174.4 18.7 168.5
9.45 5000 170.7 18.02 170.08
9.85 5120 172.9 18.36 170.08
10.35 5320 172.2 18.36 175.58
10.86 5400 172.9 18.36 177.28
11.26 5520 173.7 18.7 178.56
11.66 5600 177.4 21.08 193.08
12.06 5560 181.2 21.08 191.86
12.46 5640 180.5 21.76 188.17
12.97 5800 175.9 20.06 196.19
13.37 5680 182.7 21.08 192.14
13.77 5920 172.9 20.06 190.94
14.17 5920 183.5 21.42 195.86
14.57 6040 159.4 16.66 187.28
14.97 6120 154.9 16.66 189.08
15.39 6200 154.1 17 189.97
15.89 6280 157.1 17.34 188.17
16.3 6360 151.1 13.94 117.56

Cheers

p.s. the above looks rubbish how can I show the results better i.e. attached the Excel file?

 

[8bit]

Friday 1 April 2011 15:17:57
1ML 906 032 A 1.8l R4/5VT 0001

Group A: '002
RPM Load Inj. On Time Mass Flow
TIME
Marker STAMP /min % ms g/s
0 2120 69.9 8.84 37.39
0.48 2200 87.2 7.48 41.67
0.9 2280 98.5 8.84 47.53
1.41 2400 112.8 10.2 55.47
1.9 2520 126.3 11.9 65.56
2.3 2600 137.6 13.26 74.75
2.82 2760 158.6 15.64 93.44
3.31 2920 191 19.38 121.86
3.71 3160 191.7 22.44 154.89
4.11 3240 191.7 22.78 141.92
4.51 3440 191.7 20.74 140.31
4.93 3520 191.7 20.74 134.22
5.33 3680 191.7 20.06 135.56
5.73 3800 191.7 21.42 153.06
6.13 3960 191.7 21.76 150.42
6.53 4120 191.7 21.76 165.28
6.93 4320 191.7 21.76 160
7.34 4400 191.7 20.74 165.28
7.84 4520 191.7 22.1 174.92
8.24 4600 191.7 21.76 165.28
8.64 4760 185 20.74 158.44
9.04 4920 174.4 18.7 168.5
9.45 5000 170.7 18.02 170.08
9.85 5120 172.9 18.36 170.08
10.35 5320 172.2 18.36 175.58
10.86 5400 172.9 18.36 177.28
11.26 5520 173.7 18.7 178.56
11.66 5600 177.4 21.08 193.08
12.06 5560 181.2 21.08 191.86
12.46 5640 180.5 21.76 188.17
12.97 5800 175.9 20.06 196.19
13.37 5680 182.7 21.08 192.14
13.77 5920 172.9 20.06 190.94
14.17 5920 183.5 21.42 195.86
14.57 6040 159.4 16.66 187.28
14.97 6120 154.9 16.66 189.08
15.39 6200 154.1 17 189.97
15.89 6280 157.1 17.34 188.17
16.3 6360 151.1 13.94 117.56

There you go, you highlight the logs in the Advanced post mode and click the # symbol icon above the text box.

EDIT - actually you'd need to do it from copying and pasting direct from Excel I think, copying and pasting from your original post has stripped out the spacing.

That looks fairly good to me, that shows a peak airflow of 195.86g/s which using the rough "divide by .85" calculation shows theoretical 230.4bhp. What model of car have you got? If it's a standard/unmapped mk1 Leon Cupra R then that's looking in good shape.

 

[Ellisium]

Cheers 8bit thats good to know that it looks normal.

I should say I have a 2004 LCR with stage 1 (RS Tuning), open cone filter, Milltek cat back and 007p

Is there a measuring block which would help to identify any boost leaks or is a boost gauge necessary for this as I only have the shareware version of Vag-Com?

I will do another run this week as the above log was only my second attempt.

 

[8bit]

Ah, in that case you should really be seeing better airflow figures I'd have thought. What gear did you do that run in? Did you definitely have your foot flat to the floor?

Try unplugging the MAF sensor and see if the car feels any better. If it does then your MAF is at fault.

 

[8bit]

Is there a measuring block which would help to identify any boost leaks or is a boost gauge necessary for this as I only have the shareware version of Vag-Com?

I will do another run this week as the above log was only my second attempt.

Meant to say, there's a few blocks that VAGCOM uses for boost but they're in the 110 - 120 range so the unregistered shareware version won't log those, as far as I know. It's about £65 to get it fully registered, will be well worth the price by the time you've used it to solve even one problem yourself, an hour's labour +VAT at most garages these days won't be far off £65.

 

[Ellisium]

It was a 4th gear run but like you said need to do another run as not sure I had my foot to the floor due to just trying it out and seeing what happened.

There is a hesitancy throughout the rev range so will investigate the Vag Com Lite software further or look at getting a second hand genuine cable.. I take it the 'Lite' software doesn't allow you to make changes whereas the 'Full' software does?

I will update this thread with a better log once completed but should I also log say 003 and maybe another one at the same time as it allows me to record 3 measuring blocks at the same time?

 

[8bit]

Have you scanned for fault codes? Worth checking that too, don't need to be driving to do that. When you are doing logs though you do need to do them at wide open throttle in ideally 4th gear, 3rd if that's not possible.

Ideally only log one or two blocks at a time, the reason being that the more blocks logged the fewer samples that are taken and you might miss something if the logs don't have enough samples. VCDS Lite can be used "unregistered" but to get the full functionality you need to spend the cash. Once registered it does almost everything that full VCDS/VAGCOM does, with a few exceptions. For an explanation of what limitations the free and registered versions have see here - http://www.ross-tech.com/vcds-lite/index.html

If you've got your cable working with VCDS lite then I'd just get that registered if I were you, second hand cable setups still tend to go for a fair bit more than VCDS lite and Ross Tech don't give tech support to owners of second hand cables.

Unregistered VCDS lite only allows logging of blocks lower than 020 as far as I'm aware so that's pretty limiting. Might be worth doing 002 and 004 together to see intake airflow, cooling temp and intake air temp, or 001 and 003 to get lambda (fuelling) corrections, coolant temp, throttle and ignition angles.

There's a full list of what blocks log what stuff on the car, although bear in mind the software covers other VAG models so some things on it won't apply. See here - http://www.ross-tech.com/vag-com/m_blocks/