Hi, i have a gsr, it needs a new cat, i dont have the money right now so i got an o2 sim. Just wondering if any of you have installed one before. I need to know:
The best place to put it/ splice it. Should i catch the wires from where the o2 sensor is, and pull the wires up? I think that would be easiest, but idk where to mount it.Or should i get the wires at the ecu, i have a wiring diagram but its real confusing.

There are 3 wires, 12v power supply, ground, and signal.

 

Why don't you just go obd-1?

 

Not sure, i never really understood the benifits of that.... care to explain? i just know a lota people do it when turboing.

 

One of the benifits is ease of tuning. Another is that you don't have to run two O2 sensors. Just pic up a obd-1 p72 ECU and and a conversion harness and swap them in.

 

Where is a good place to find the OBD1 ECU & harness?

 

Pm'd