I have a 2000 4.8 with a small cam, long tube headers, and cold air intake. I recently pulled my plugs to find that the porcelain is cracked and that the engine is running lean. I'm new to tuning and would really appreciate if someone could help me out! Thanks in advance
Without a wideband you really have no idea if you are running lean or not, get one of those otherwise you are just shooting in the dark.
You could attempt to dial in the MAF and VE tables with fuel trims but that is only going to work for part throttle, anything WOT will be open loop with zero o2 sensor control and will be going 100% off your airflow tables. So if they are wrong, everything is wrong. This is why a wideband is a must to know what the real time air fuel ratio is.
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.
Would I need one or two of them
One
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