So I'm tuning a stock 09 gmc sierra 5.3.
Didn't touch the tune besides shutting on rear 02s because I put a wideband in.
Did a pull just got a starting point. Wot hit 9.5 to 8.9 don't understand why. Also had quite of bit of knock turned off cot and same thing. The truck has no codes
Why is it dumping fuel and getting knock
Lol sorry I'm still a noob thanks in advace.
Forgot to add, the perfect stoich table is like non existent lol
So the wideband is after the cat converter??
If so, you will never get a correct readings of real time AFR.
Look at the eq ratio, I'm sure it's up near 1.250 or 1.300ish, thats around 10.5 to 11.4 give or take a little for AFR as they do run rich from the factory.
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.
It's in bank2. I will have to look at it tomorrow and yea the eq table is that rich.
I guess we need to find another place for the wideband and go from their.
Thanks I will keep you updated
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