oxygen sensor wiring

[stevesLX]

Does it matter which plug on the harness I hook up to the oxygen sensors. I just have 1 set of sensores that are in my full length headers. I just need to know if it matters which one plugs into which off the harness.

 

[jrichker]

No info about your car's model year. No info about your car's model year, EFI or carb, no mods listed. Make it hard to troubleshoot when we don't know what you have.

Therefore no clue as to which wiring diagram you need. The wiring changed several times between 79 & 95

That's why it is a good idea to use the sig under the user control panel (User CP) option. It allows you to post your car year & mods, which help greatly when troubleshooting things. No, it is not there for us to snoop and see any "Secrets" you have hidden away under the hood. Be a good stangnetter and update you sig for future reference & don't keep us guessing.

 

[stevesLX]

O.K. I will get on that but for now it is a 89LX. I am curious if it matters which plugs off the harness for the oxgen sensors hook up to the sesors themselves. If you hook up the left one to the right side of the harness and the right one up to the left side of the harness does that make a difference or not?

 

[Red88 RICK]

I also have a problem that kinda has soemhting to do with this topic i just finnaly put my engine in after a long confusing rebuild (everthing off the engine i baught was missing) so i go to hook up the o2 sensors in my 88 gt and i can only find one plug i looked everywhere on the passenger side and cant find it anyone know if its in some wierd place that i might have mayb moved a wire while putting the engine in ?

 

[stevesLX]

Just so there is no confusion here. I know where my O2 harness is and it is currently hooked up to the O2 sensors. I am just curious if it matters which plug of the 2 on the harness go to either the left or to the right side O2 sensor. Or can I just hook the plugs up to either side? I have a 89 LX.

 

[jrichker]

Diagram courtesy of Tmoss & Stang&2birds

See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host) for help on 88-95 wiring http://www.veryuseful.com/mustang/tech/engine/

Ignition switch wiring
http://www.veryuseful.com/mustang/tech/engine/images/IgnitionSwitchWiring.gif

Fuel pump, alternator, ignition & A/C wiring
http://www.veryuseful.com/mustang/tech/engine/images/fuel-alt-links-ign-ac.gif

Computer, actuator & sensor wiring
http://www.veryuseful.com/mustang/tech/engine/images/88-91_5.0_EEC_Wiring_Diagram.gif

Fuse panel layout
http://www.veryuseful.com/mustang/tech/engine/images/MustangFuseBox.gif

Vacuum routing
http://www.veryuseful.com/mustang/tech/engine/images/mustangFoxFordVacuumDiagram.jpg

 

[302RollinHard]

I think it will matter a lot because it measures the amount of unburned hydrocarbons left in the exhaust and richens/leans out the AF ratio accordingly. And it is bank specific. Let's just say you have the O2 sensor wires crossed and your driver side bank is ACTUALLY running lean, but you have your O2 sensor wires crossed and your passenger side is ACTUALLY running a bit rich and the O2 (that is meant for the driver side) is reading rich. Your ECU goes and leans up the drivers side bank accordingly and then you are in trouble IMHO. I wouldn't do it, or I would figure out which was which and get it set up right. The passenger side O2 sensor was run with your starter wires from what I remember (the group of wires that looped up under the balancer).