I have a 2001 5.3 with a Howards Rattler cam (226/234 525 lift)springs to match cam and a 2800 stall turbo 350. My 02 sensors are reading 450mv at idle but only one is reading voltage in my graph. It runs and idles good with the STFT and LTFT in open loop, as soon as I put in closed loop my STFT go to -25 on one bank and +50 on the other and it is so rich it wont even hardly run. I am new to HP tuners and have the beginers book from the tunning school and have followed it word for word. Do I have a 02 problem or do I have a tune problem or both?? I have attached my tune and my log. I believe I have my scanner PID's right but I am questioning myself in every aspect. Please give me some advice, help or anything to steer me in the right direction. Anything would be greatly appreciated
Thanks, ChrisNew Rattler Tune 17 MAF disabled LTFT Enabled.hpt26 idle.hpl