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Commanded AFR changes outside of PE...

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Old Apr 22, 2016 | 12:47 PM
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Default Commanded AFR changes outside of PE...

So I have been fortunate enough to get some help from another forum member to dial in my LS2 fuel injectors. During the data logging process, I've captured something strange. My commanded afr changes from 14.68, to 15.46 and then back to 14.68 again. I never tripped PE during this log. I have PE set to kick in at 65% TPS while I log data, so it's not PE commanding a change. Plus it would be richer if it were PE...

What else would make a change in commanded afr?

FYI, the config posted is only used for data logging purposes, it's not my running calibration.

Check frame 3327.
Attached Files
File Type: hpl
InjectorDataLog2.hpl (371.9 KB, 76 views)
File Type: cfg
ConfigforInjectorData.cfg (2.5 KB, 67 views)
File Type: hpt
InjectorTestTune3.hpt (497.3 KB, 148 views)
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Old Apr 22, 2016 | 01:59 PM
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That's a Cat converter test. I'm having the same issue in a 2006 Silverado 6L. Hp Tuners is working on adding the Cat test disable field/table like the 2007+ new body style trucks.

Russ Kemp
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Old Apr 22, 2016 | 02:27 PM
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Originally Posted by Russ K
That's a Cat converter test. I'm having the same issue in a 2006 Silverado 6L. Hp Tuners is working on adding the Cat test disable field/table like the 2007+ new body style trucks.

Russ Kemp
NICE! Good to know my tune's not fracked!

Thanks Russ.
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Old Apr 24, 2016 | 11:47 AM
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+1 on the catalyst efficiency test.
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