Hmm my harness is very close to plug wires. Hedman conversion headers. About 5 inches longer than stock camaro manifolds. But I thought heated o2 should be fine. I'll try running it with o2 unplugged. And raise harness because it's practically on top of the distributer

Unplugged tps to force in limp mode. Ran great. Has to be feedback issue from o2.

Thanks for response. Greatly appreciated