Had another random thought in my head today I figured I'd ask. Is there anyway to have the pcm read my wide band instead of my o2's? I have a trick turbo kit and I am running a wide band in my down pipe off my Aeroforce Interceptor gauge. Is there any benefit to this? The reason I ask this is because since this turbo kit is a flow though style log setup, how can the o2's get a proper reading on bank 2 if bank 1 is flowing through it. My AFR'S are swinging pretty wide in closed loop (between 13.0-16.0). My AFR's never seem to stay the same. They change when in park, D, and on cold start-ups it goes up to 19.0 and the truck wants to die out and then they go back to 14 and it runs fine. It also goes to 19.8 when I start to press the gas pedal after coming to a stop (normal driving). It seems as soon the the throttle starts to crack open quickly the afr's shoot up and the truck hesitates for a second and then they go back down to around 13-16 and it runs fine again. I either need to get the truck back to the tuner or just find another tuner but I was just wondering that if running off the wide band would help.

 

Bad tune.

 

As GMC truck said, you have a bad tune. IF it was the base tune they sent with the turbo kit, you do need to know that all motors run differently.

If you do have HP Tuners, shoot me a msg!