so I recently finished up my swap on my 93 Silverado it has a Ls1 with a torque max sns stage 2 cam with supporting mods the wiring harness is from BP Automotive the motor runs fine in closed loop but once it warms up it starts to die out and hesitates really bad to get going will not idle by itself. All the sensors are brand new I recently switched out O2s from AC Delco to Bosch and no luck truck currently has no exhaust taking it tommorow to get it done but smells super rich I have no vacuum leaks good injector new spark plugs and wires basically everything new I have one ground from harness to back of driver side cylinder head a ground strap infront of block on passenger side and a ground infront of block driver sode head fuel pressure is good custom tune from Tuned By Frost any help will be greatly appreciated! Keep in mind it only runs bad at part throttle and idle it will clear up under wide open throttle.

Agreed as well. The o2’s don’t read well without exhaust behind them. I chased this same issue once.

Yes sorry it runs bad in closed loop and good In open I messed up the wording exhaust shop got busy and couldn’t get it done today I’ll let you guys know by next week if exhaust helps

Good news I couldn’t wait for exhaust shop so I just added about 4ft of pipe to the headers and that fixed it truck runs great now! Thanks everyone for helping.