So my 04 2.7 liter tacoma wont pass emissions due to something in the o2 sensors the upstream was bad so I replaced it put a new cat in didnt fix it so I bought a downstream simulator now iam trying to tune the voltage I set it to 1volt it came back to rich so I set it to. 26 came back to lean so I set it to. 34v and iam yet to get feed back I was curious what voltage I need to set it to in order to keep the check engine light off anyone got info
