Weird, rough idle

[hilas07]

It will have nothing to do with the software. You are wasting your time doing anything before scanning it and checking those blocks 032 111.

Diagnose first, don't throw money at it.

Gavin

So I finally had a chance to meet with zei20t and he was very helpful. We were able to replicate the issue and scan blocks 111 and 033 (tried 032 but nothing was happening). We put marks 1-4 where the lumpiness was most noticeable.

Let me know if you'd like a copy of the logs to make it a little easier to read, i can email it to you, cheers

Group A: '111 Group B: '028 Group C: '033
Lambda Lambda Lambda Lambda RPM Load Temperature Lambda Voltage Bin. Bits Bin. Bits
TIME TIME TIME
Marker STAMP % % % % STAMP /min % °C STAMP % V
0.3 0 0 -0.3 0 0.59 680 21.1 96 Test OFF 0.01 0.8 1.5
1.2 0 0 -0.3 0 1.49 760 20.3 96 Test OFF 0.9 2.3 1.62
2.1 0 0 -0.3 0 2.41 720 20.3 96 Test OFF 1.8 2.3 1.48
3.01 0 0 -0.3 0 3.31 720 19.5 96 Test OFF 2.71 1.6 1.58
3.91 0 0 -0.3 0 4.22 720 19.5 97 Test OFF 3.6 -0.8 1.52
4.82 0 0 -0.3 0 5.11 720 20.3 97 Test OFF 4.52 -1.6 1.52
5.73 0 0 -0.3 0 6.03 760 19.5 97 Test OFF 5.43 -1.6 1.52
6.63 0 0 -0.3 0 6.92 760 19.5 97 Test OFF 6.33 -1.6 1.52
7.53 0 0 -0.3 0 7.84 720 19.5 97 Test OFF 7.24 1.6 1.54
8.44 0 0 -0.3 0 8.74 720 19.5 97 Test OFF 8.14 1.6 1.52
9.35 0 0 -0.3 0 9.64 760 19.5 97 Test OFF 9.04 0.8 1.5
10.25 0 0 -0.3 0 10.56 720 19.5 97 Test OFF 9.95 0.8 1.54
11.16 0 0 -0.3 0 11.46 760 19.5 98 Test OFF 10.85 -1.6 1.54
12.06 0 0 -0.3 0 12.36 720 20.3 97 Test OFF 11.76 -2.3 1.52
12.97 0 0 -0.3 0 13.27 760 19.5 98 Test OFF 12.66 -2.3 1.52
13.86 0 0 -0.3 0 14.17 720 20.3 98 Test OFF 13.57 -2.3 1.54
14.77 0 0 -0.3 0 15.08 720 20.3 98 Test OFF 14.48 1.6 1.54
15.68 0 0 -0.3 0 15.98 720 21.1 98 Test OFF 15.38 1.6 1.52
1 16.59 0 0 -0.3 0 16.89 760 20.3 98 Test OFF 16.3 1.6 1.54
17.49 0 0 -0.3 0 17.8 720 19.5 98 Test OFF 17.19 2.3 1.52
18.4 0 0 -0.3 0 18.7 720 19.5 98 Test OFF 18.1 -1.6 1.5
19.3 0 0 -0.3 0 19.61 720 19.5 98 Test OFF 19 -2.3 1.54
20.2 0 0 -0.3 0 20.51 760 19.5 98 Test OFF 19.91 -2.3 1.5
21.12 0 0 -0.3 0 21.42 720 19.5 98 Test OFF 20.81 -2.3 1.52
22.02 0 0 -0.3 0 22.31 720 19.5 98 Test OFF 21.72 0.8 1.54
22.93 0 0 -0.3 0 23.23 760 19.5 98 Test OFF 22.62 0.8 1.52
23.83 0 0 -0.3 0 24.13 720 19.5 98 Test OFF 23.52 0.8 1.54
24.74 0 0 -0.3 0 25.03 720 19.5 98 Test OFF 24.43 1.6 1.54
25.63 0 0 -0.3 0 25.94 760 20.3 98 Test OFF 25.34 -1.6 1.52
26.55 0 0 -0.3 0 26.85 760 19.5 98 Test OFF 26.24 -2.3 1.52
27.44 0 0 -0.3 0 27.75 720 19.5 98 Test OFF 27.15 -2.3 1.54
28.36 0 0 -0.3 0 28.66 760 19.5 98 Test OFF 28.06 -1.6 1.5
29.26 0 0 -0.3 0 29.57 760 21.1 98 Test OFF 28.96 0.8 1.52
30.17 0 0 -0.3 0 30.47 720 19.5 98 Test OFF 29.87 1.6 1.54
31.07 0 0 -0.3 0 31.38 760 19.5 98 Test OFF 30.76 1.6 1.5
31.98 0 0 -0.3 0 32.27 720 19.5 98 Test OFF 31.68 1.6 1.54
32.88 0 0 -0.3 0 33.18 720 19.5 98 Test OFF 32.58 -1.6 1.54
33.78 0 0 -0.3 0 34.09 760 19.5 98 Test OFF 33.48 -1.6 1.54
34.68 0 0 -0.3 0 35 720 19.5 99 Test OFF 34.39 -1.6 1.5
35.6 0 0 -0.3 0 35.89 760 19.5 99 Test OFF 35.3 -1.6 1.52
36.51 0 0 -0.3 0 36.81 720 19.5 99 Test OFF 36.2 0.8 1.5
37.41 0 0 -0.3 0 37.71 760 19.5 99 Test OFF 37.11 0.8 1.52
38.32 0 0 -0.3 0 38.62 720 20.3 99 Test OFF 38.01 0.8 1.54
39.22 0 0 -0.3 0 39.52 760 19.5 99 Test OFF 38.92 0.8 1.54
40.13 0 0 -0.3 0 40.43 720 21.1 99 Test OFF 39.82 -1.6 1.54
2 41.03 0 0 -0.3 0 41.33 760 19.5 99 Test OFF 40.73 -1.6 1.6
41.93 0 0 -0.3 0 42.24 720 19.5 99 Test OFF 41.63 -1.6 1.5
42.84 0 0 -0.3 0 43.14 720 19.5 99 Test OFF 42.54 -2.3 1.48
43.75 0 0 -0.3 0 44.05 720 19.5 99 Test OFF 43.45 0.8 1.52
44.65 0 0 -0.3 0 44.94 720 19.5 99 Test OFF 44.35 0.8 1.5
45.56 0 0 -0.3 0 45.86 720 19.5 99 Test OFF 45.26 0.8 1.54
46.46 0 0 -0.3 0 46.76 720 19.5 99 Test OFF 46.16 0.8 1.54
47.37 0 0 -0.3 0 47.67 760 20.3 99 Test OFF 47.07 -2.3 1.54
3 48.27 0 0 -0.3 0 48.58 720 20.3 99 Test OFF 47.96 -1.6 1.54
4 49.17 0 0 -0.3 0 49.48 720 21.8 99 Test OFF 48.88 -1.6 1.54
50.08 0 0 -0.3 0 50.39 760 21.1 99 Test OFF 49.78 -2.3 1.48
50.98 0 0 -0.3 0 51.28 760 21.8 99 Test OFF 50.69 0.8 1.58
51.88 0 0 -0.3 0 52.2 720 23.3 99 Test OFF 51.59 1.6 1.56
52.8 0 0 -0.3 0 53.09 760 21.1 99 Test OFF 52.49 3.9 1.62
53.7 0 0 -0.3 0 54.03 720 21.1 99 Test OFF 53.4 2.3 1.44
54.71 0 0 -0.3 0 55 760 21.1 99 Test OFF 54.43 -0.8 1.54
55.61 0 0 -0.3 0 55.98 720 21.1 99 Test OFF 55.31 -0.8 1.5
56.53 0 0 -0.3 0 56.81 760 22.6 99 Test OFF 56.22 -1.6 1.54
57.42 0 0 -0.3 0 57.73 760 21.8 99 Test OFF 57.12 2.3 1.58
58.34 0 0 -0.3 0 58.62 760 20.3 99 Test OFF 58.03 2.3 1.5
59.24 0 0 -0.3 0 59.53 760 21.1 99 Test OFF 58.94 2.3 1.56
60.14 0 0 -0.3 0 60.43 720 21.8 99 Test OFF 59.84 2.3 1.54
61.05 0 0 -0.3 0 61.35 720 21.1 99 Test OFF 60.75 -1.6 1.5
61.95 0 0 -0.3 0 62.26 760 21.1 99 Test OFF 61.64 -1.6 1.56
62.85 0 0 -0.3 0 63.15 720 20.3 99 Test OFF 62.56 -2.3 1.48
63.76 0 0 -0.3 0 64.06 760 20.3 99 Test OFF 63.46 -2.3 1.5
64.67 0 0 -0.3 0 64.97 760 20.3 99 Test OFF 64.37 0 1.5
65.56 0 0 -0.3 0 65.87 720 21.1 99 Test OFF 65.27 0 1.52
66.48 0 0 -0.3 0 66.78 760 21.1 99 Test OFF 66.18 0 1.54
67.38 0 0 -0.3 0 67.68 720 21.1 99 Test OFF 67.07 0 1.54
68.29 0 0 -0.3 0 68.58 720 21.1 99 Test OFF 67.99 -2.3 1.56

[zei20t]

Without ripping too much off the engine; we also cleaned the throttle body. looked pretty good, but gave it a quick spray, a bit of oil came out, pretty normal IMO.

also removed 2 plugs (3&4) - there was a misfire on cylinder 3 - checked them and both were fine, also swapped coils 3 and 4 in case the problem moved.

Besides a boost/vacuum leak I wouldn't want to guess, maybe PCV or the crank-case ventilation?

Happy to do some more logging when you need it mate.

[hilas07]

Had a phone convo with Paul from Muller & Muller at Lakemba, few possible issues..

Going to swap the battery temporarily to distinguish if it is a battery/electrical issue, if not a possible Vacuum leak or injector issue.

Has anyone had any experience at this shop?

[noone]

really hard to read the data, better to make a spreadsheet and screen-cap so we can read it.

[hilas07]

Will try my best tomorrow to put a spreadsheet together from the original file..

Visited muller and muller and he had a look and did a quick scan.. Suggested more than likely coolant temperature sensor, roughly $200 to change the part. Anyone had any experience with this? Thanks in advance guys


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