HO2 Sensor Readings on Cold Start-up
Is it normal for both OEM front HO2 sensor readings to fluctuate randomly (104-786) at idle, on initial cold start-up; rear HO2's are disabled. The OEM 5.3L L33 VIN B engine appears to be running smoothly otherwise, but I haven't run it long enough to fully warm up; no radiator fans installed yet.
Thats how front o2 sensors work, they switch up and down rapidly.
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
That is what you want to see. They will get lazy and stay flatter once they start going bad. They take a few seconds for the heaters to warm up as well.
I appreciate the help. Reading about EFI function is one thing. Seeing it in action with this VCM suite; it's truly amazing. Thanks.
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