While I do enjoy and have had great results tuning Cummins and Duramax, I can't get a good handle on my gas motor. So I could use some help.
I purchased a 2008 Chevy Silverado 1500 crew cab 4x4 5.3 (E38) flex fuel back in April of this year. Since then I have installed tri-y headers (fabbed in high flow cats) with all 4 stock O2s, free flowing exhaust, performance oriented rebuilt transmission with 2000 rpm stall converter. Only engine work I've done was replace the camshaft (mild Comp truck cam) due premature failure of the stocker and to also mechanically be rid of the AFM crap.
Any help would be appreciated.