Help I hooked it up to the wire 2nd from left (looking from back) in the middle plug, but it doesn't seem to be that one. Can you tell me where to plug it in?



Also, which part of the FSM shows what the ECU plugs are?



http://iluvmyrx7.com/1989_factory_service_manual.htm



thanks

 

I just ran a wire from the O2 sensor through the firewall to the gauge. I wouldn't mess with the ECU if I didn't have to. Just follow the wire from the sensor to the connector plug and tap into it there.

 

It's bad to do that cause the wire might be shielded.



I went to Apex'i website and found it. Here it is: