Help deciphering data logs. Block 115
06-16-2002, 12:50 PM
#12
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Your sample rate is low
Check here to speed it up a bit <a href="http://www.ross-tech.com/vag-com/tour/option_screen.html">Vag-Com options</a>
Also try doing the run in 3rd gear starting around 30mph, it will give more samples.
Also try doing the run in 3rd gear starting around 30mph, it will give more samples.
06-16-2002, 01:38 PM
#13
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Ok, how's this one?
Group A: '115
Engine speed Engine load Spec'd Boost Actual Boost
TIME 990-1800 mbar <=1800 mbar
STAMP /min % mbar mbar
0.36 2960 108.3 1390 1470
0.76 3080 123.3 2080 1600
1.17 3200 156.4 2160 2020
1.56 3440 166.9 2160 2160
1.97 3520 172.9 2150 2270
2.37 3880 157.9 2150 2130
2.78 3960 106.8 2260 1360
3.18 4080 103 2250 1360
3.59 4200 104.5 2100 1340
4 4320 42.9 980 1290
4.43 4400 103.8 2110 1360
4.85 4520 103.8 2190 1340
5.39 4680 103.8 2170 1340
5.82 4800 102.3 2140 1330
6.26 4920 102.3 2130 1320
6.7 4880 11.3 980 1300
7.12 3880 16.5 980 1080
7.63 3840 95.5 2120 1280
8.02 3920 145.9 2260 2020
8.42 4000 162.4 2270 2250
8.83 4040 118 2270 1570
9.23 4040 73.7 980 1450
9.64 4040 68.4 980 1380
10.14 4080 104.5 1870 1370
10.56 4120 104.5 2250 1360
10.96 4160 103.8 2240 1360
11.38 4160 33.1 980 1340
11.77 4120 10.5 980 1140
12.17 4040 9.8 980 1070
Engine speed Engine load Spec'd Boost Actual Boost
TIME 990-1800 mbar <=1800 mbar
STAMP /min % mbar mbar
0.36 2960 108.3 1390 1470
0.76 3080 123.3 2080 1600
1.17 3200 156.4 2160 2020
1.56 3440 166.9 2160 2160
1.97 3520 172.9 2150 2270
2.37 3880 157.9 2150 2130
2.78 3960 106.8 2260 1360
3.18 4080 103 2250 1360
3.59 4200 104.5 2100 1340
4 4320 42.9 980 1290
4.43 4400 103.8 2110 1360
4.85 4520 103.8 2190 1340
5.39 4680 103.8 2170 1340
5.82 4800 102.3 2140 1330
6.26 4920 102.3 2130 1320
6.7 4880 11.3 980 1300
7.12 3880 16.5 980 1080
7.63 3840 95.5 2120 1280
8.02 3920 145.9 2260 2020
8.42 4000 162.4 2270 2250
8.83 4040 118 2270 1570
9.23 4040 73.7 980 1450
9.64 4040 68.4 980 1380
10.14 4080 104.5 1870 1370
10.56 4120 104.5 2250 1360
10.96 4160 103.8 2240 1360
11.38 4160 33.1 980 1340
11.77 4120 10.5 980 1140
12.17 4040 9.8 980 1070
06-16-2002, 01:55 PM
#14
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Here's a chart (I think). Actual boost is WAY low, no?
<center><img src="http://pictureposter.audiworld.com/3954/115chart.jpg"></center><p>
And now it is consistently throwing 3 DTC's when I go more than 3/4 throttle.
Multiple misfires
Cyl 2 misfire
Cyl 5 misfire
But it still runs fine below 1 bar!
And now it is consistently throwing 3 DTC's when I go more than 3/4 throttle.
Multiple misfires
Cyl 2 misfire
Cyl 5 misfire
But it still runs fine below 1 bar!
06-16-2002, 05:37 PM
#16
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That's funky, does your boost guage match the ecu? that could be a bad boost sensor, or a leak.
I'm curious if the actual boost the ecu is reporting is correct.
It seems fine at first, then it just falls on its face... I suppose engine misfiring could cause the actual boost to drop since there isn't enough energy to spool the turbos... but the low sensed or actual boost could be causing the misfires...
It seems fine at first, then it just falls on its face... I suppose engine misfiring could cause the actual boost to drop since there isn't enough energy to spool the turbos... but the low sensed or actual boost could be causing the misfires...
06-16-2002, 05:50 PM
#17
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Yes, the gauge shows a dramtic drop after it reaches 1 bar.
I don't think the misfires are the cause, more the effect, because it runs fine otherwise. Besides, when I check for misfires in blocks 15 and 16? at idle, everything loooks fine...no misfires. I'm really not looking forward to asking teh dealer to fix it. Don't have much faith in their abilities.
06-16-2002, 05:57 PM
#18
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I suppose you could make an adapter to attach to the top of the Y-pipe and slowly pressurize your
intake system to 1 bar. Keep in mind that you will blow a little smoke after the procedure, apparently the pressure forces a little oil out of the exhaust side turbo shaft seal.
Very wierd, could you do another 3rd gear O2 sensor run with your new settings?
Thanks!
Very wierd, could you do another 3rd gear O2 sensor run with your new settings?
Thanks!
06-16-2002, 06:00 PM
#19
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John, have you thought about borrowing a stock chip to see if it only happens at chipped boost?
I'm curious if it's only happening at the high boost levels.
Seems like it is a fuel delivery problem and it is leaning out at high boost. (But what do I know?)
Seems like it is a fuel delivery problem and it is leaning out at high boost. (But what do I know?)