Hello, I have a 2016 Silverado with a 5.3l. The engine is stock with stock injectors. Something I noticed while tuning is mostly when the ETC is under operating temp, while coasting the engine will drop to a 10ish afr for a few seconds then go into DEFCO 22.0 afr. Is there any setting to change so it will at least go back to stoich instead of wasting gas? All the posts I seen with a similar issue says its due to bad injector data. Any other settings that could fix this?
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