P219a & P219b
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Teching In
Joined: Apr 2025
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P219a & P219b Hello all! I am having a strange issue with my 2011 Silverado 5.3l v8.
I am running a p219a and p219b air/fuel imbalance on bank 1 and bank 2. I have checked my air box, air filter, changed MAF, TPS, checked fuel it sits at 45 at idle, 55-60 key on. MAF Reads 4.3, SHRTFT1 -0.8 LONGTFT1 15.6, SHRTFT2 -2.3 - 4, LONGTFT2 18.0, O2 BANK1 Reads 0 to 0.700, o2 BANK 2 Reads 0 to 0.720.
Issues is very sluggish response, hard shifting(new trans) you can feel the misfire here and there and when it drops down to v4 you can hear it sputter until you put your foot back on gas. WOT gets me literally nowhere.
I am running a p219a and p219b air/fuel imbalance on bank 1 and bank 2. I have checked my air box, air filter, changed MAF, TPS, checked fuel it sits at 45 at idle, 55-60 key on. MAF Reads 4.3, SHRTFT1 -0.8 LONGTFT1 15.6, SHRTFT2 -2.3 - 4, LONGTFT2 18.0, O2 BANK1 Reads 0 to 0.700, o2 BANK 2 Reads 0 to 0.720.
Issues is very sluggish response, hard shifting(new trans) you can feel the misfire here and there and when it drops down to v4 you can hear it sputter until you put your foot back on gas. WOT gets me literally nowhere.
Last edited by Miketoole92; Apr 30, 2025 at 12:52 PM.
Thread Starter
Teching In
Joined: Apr 2025
Posts: 4
Likes: 0
mine is none flex, also i replaced the fuel pump all codes went away but its still sluggish as hell, trans read 202 today as well and it's literally brand new with a new cooler.
