First off this is an 06 Sierra with a 5.3 with the STS turbo T67 with a front mount intercooler and #44 injectors,and a 551 551 114 cam. I had Nelson do the tuning. I just finished putting on the STS kit today. I hooked up an LM1 wideband to the truck tonight and made a few runs. It seems to be only making about 3-4 PSI of boost, and honestly feels not much stronger then stock. The truck idles fine and is running 15.8 AFR and at part throttle is about 15-15.1 AFR. Now at wide open throttle it reads 9.6-9.8AFR. I know this is way to rich.
My question is will it lean out to 11.4-11.5AFR if I turn up the boost 2-3PSI.
Thanks for any help.