If you are going to run any O2 sensor feedback based engine on an engine stand I would bet with open exhaust you need to leave the O2 sensors unplugged so it does not go into closed loop.
Type: Posts; User: 2xls1
If you are going to run any O2 sensor feedback based engine on an engine stand I would bet with open exhaust you need to leave the O2 sensors unplugged so it does not go into closed loop.