Hey guys I hope you guys can shed some light on my issue here. I had been running my truck in open loop up until today. Im trying to get it dialed in so it can utilize the fuel trims. i installed O2 sensors and they seem to be reading just fine but as soon as it switches to closed loop one of the O2 sensors MV reading tanks. Also i notice the LtFt B2 is always at 25%. I have a gen 3 5.3L with a MS4 cam and a whipple supercharger. Any ideas would be greatly appreciated. Thanks!