Now that I have the wideband and logging software running, I'm going to tune up the 3.4. I'll post my results here, and hope to get some discussion going re: tuning.
I went for a drive to take kid #2 to hockey and these were my results from the logging:
Wide Latest
RPM \ MAP 20 30 40 50 60 70 80 90 100
400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
800 0.0 120.0 120.0 125.0 0.0 0.0 0.0 0.0 0.0
1200 125.0 120.0 120.0 127.0 125.0 123.0 0.0 0.0 0.0
1600 120.0 125.0 125.0 120.0 125.0 128.0 123.0 0.0 0.0
2000 120.0 120.0 126.0 127.0 128.0 128.0 128.0 125.0 0.0
2400 120.0 120.0 125.0 129.0 126.0 128.0 125.0 0.0 0.0
2800 120.0 126.0 127.0 126.0 126.0 127.0 126.0 126.0 0.0
3200 120.0 126.0 126.0 126.0 126.0 126.0 126.0 126.0 0.0
3600 120.0 128.0 0.0 128.0 0.0 0.0 125.0 0.0 0.0
4000 127.0 0.0 0.0 0.0 0.0 127.0 0.0 0.0 0.0
4400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
4800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
5200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
5600 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
6000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
6400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Wide Avg
RPM \ MAP 20 30 40 50 60 70 80 90 100
400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
800 0.0 120.1 120.3 125.0 0.0 0.0 0.0 0.0 0.0
1200 125.0 120.2 120.6 124.5 126.0 121.5 0.0 0.0 0.0
1600 120.2 121.4 123.7 122.7 125.0 124.5 123.0 0.0 0.0
2000 120.8 123.5 123.8 123.6 127.2 126.0 128.0 125.0 0.0
2400 122.0 126.4 126.5 126.6 125.2 127.8 127.0 0.0 0.0
2800 121.9 127.5 127.9 127.1 127.2 128.1 127.0 125.5 0.0
3200 124.2 127.7 127.5 126.7 126.8 127.0 126.5 126.0 0.0
3600 122.5 128.0 0.0 128.0 0.0 0.0 125.0 0.0 0.0
4000 126.0 0.0 0.0 0.0 0.0 126.0 0.0 0.0 0.0
4400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
4800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
5200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
5600 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
6000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
6400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Wide # Samples
RPM \ MAP 20 30 40 50 60 70 80 90 100
400 0 0 0 0 0 0 0 0 0
800 0 8 20 1 0 0 0 0 0
1200 1 38 21 4 2 2 0 0 0
1600 34 18 13 22 4 2 2 0 0
2000 32 13 29 9 13 5 3 1 0
2400 26 13 37 25 20 8 6 0 0
2800 16 23 18 26 9 11 6 2 0
3200 10 6 35 9 13 8 4 1 0
3600 2 1 0 1 0 0 3 0 0
4000 2 0 0 0 0 2 0 0 0
4400 0 0 0 0 0 0 0 0 0
4800 0 0 0 0 0 0 0 0 0
5200 0 0 0 0 0 0 0 0 0
5600 0 0 0 0 0 0 0 0 0
6000 0 0 0 0 0 0 0 0 0
6400 0 0 0 0 0 0 0 0 0
Wide Avg 10
RPM \ MAP 20 30 40 50 60 70 80 90 100
400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
800 0.0 120.1 120.0 125.0 0.0 0.0 0.0 0.0 0.0
1200 125.0 120.5 120.8 124.5 126.0 121.5 0.0 0.0 0.0
1600 120.6 122.1 124.3 124.4 125.0 124.5 123.0 0.0 0.0
2000 120.5 123.8 124.7 123.6 127.9 126.0 128.0 125.0 0.0
2400 120.8 127.0 127.8 127.7 125.9 127.8 127.0 0.0 0.0
2800 121.7 126.9 128.5 127.2 127.2 128.1 127.0 125.5 0.0
3200 124.2 127.7 126.0 126.7 127.0 127.0 126.5 126.0 0.0
3600 122.5 128.0 0.0 128.0 0.0 0.0 125.0 0.0 0.0
4000 126.0 0.0 0.0 0.0 0.0 126.0 0.0 0.0 0.0
4400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
4800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
5200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
5600 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
6000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
6400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Wide Std. Dev. 10
RPM \ MAP 20 30 40 50 60 70 80 90 100
400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
800 0.0 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0
1200 0.0 1.5 2.4 2.9 1.0 1.5 0.0 0.0 0.0
1600 1.8 2.3 1.8 2.2 1.2 3.5 0.0 0.0 0.0
2000 1.5 1.7 1.3 2.4 0.3 2.1 0.0 0.0 0.0
2400 2.4 2.4 1.5 0.9 1.0 0.4 1.4 0.0 0.0
2800 3.4 1.4 1.3 0.9 0.6 0.5 0.8 0.5 0.0
3200 3.8 1.2 0.0 2.6 1.0 1.3 1.1 0.0 0.0
3600 2.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
4000 1.0 0.0 0.0 0.0 0.0 1.0 0.0 0.0 0.0
4400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
4800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
5200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
5600 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
6000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
6400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Narrow Correction 10
RPM \ MAP 20 30 40 50 60 70 80 90 100
400 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000
800 1.000 1.000 0.938 1.000 1.000 1.000 1.000 1.000 1.000
1200 1.000 0.938 1.000 1.000 0.984 1.000 1.000 1.000 1.000
1600 0.938 1.000 0.969 0.951 1.000 1.000 1.000 1.000 1.000
2000 0.951 0.969 0.945 0.949 1.000 0.980 1.000 0.977 1.000
2400 0.975 1.000 0.992 0.977 0.975 1.000 0.977 1.000 1.000
2800 1.000 1.008 1.008 0.992 1.000 1.003 1.000 1.000 1.000
3200 0.945 1.000 1.008 0.988 0.996 1.008 1.000 1.000 1.000
3600 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000
4000 1.000 1.000 1.000 1.000 1.000 0.992 1.000 1.000 1.000
4400 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000
4800 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000
5200 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000
5600 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000
6000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000
6400 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000
Wide Correction 10
RPM \ MAP 20 30 40 50 60 70 80 90 100
400 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000
800 1.000 0.938 0.938 0.977 1.000 1.000 1.000 1.000 1.000
1200 0.977 0.941 0.944 0.973 0.984 0.949 1.000 1.000 1.000
1600 0.942 0.954 0.971 0.972 0.977 0.973 0.961 1.000 1.000
2000 0.941 0.967 0.974 0.965 0.999 0.984 1.000 0.977 1.000
2400 0.944 0.992 0.998 0.998 0.984 0.998 0.992 1.000 1.000
2800 0.951 0.991 1.004 0.994 0.994 1.001 0.992 0.980 1.000
3200 0.970 0.997 0.984 0.990 0.992 0.992 0.988 0.984 1.000
3600 0.957 1.000 1.000 1.000 1.000 1.000 0.977 1.000 1.000
4000 0.984 1.000 1.000 1.000 1.000 0.984 1.000 1.000 1.000
4400 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000
4800 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000
5200 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000
5600 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000
6000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000
6400 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000
Man I hope the tables show up right. Anyway, the ecm is saying that I'm generally too rich down low, then approaching stoich at higher rpms and higher throttle settings.
So, with the wot values at about 11:1, I'll run the adjustable fuel pressure reg down to see the wot values about 12.8 or so. this will hopefully coincide with the lower cells being around stoich. Then, I'll retune the 'middle cells' because they will be lean.
I've read a buch of stuff online which says get your fuel right, then mess with your timing a bit at a time, so that is my overall plan.
Chay
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86 SE 3.4
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