I am about to install heated 02 sensor , where is everyone hooking the power side? What is the best option for ignition on power?

 

I ran a fused wire from the fuse box "ign" terminal out to the 02

 

ok. I see others ran from fuel pump also. Thanks

 

It's been a while. I also found somewhere in the fuse box (might have been "ign" terminal) that only got power with the car running. Used that and been fine for years.

 

How are you getting to the fuse Box are you drilling a separate hole through the firewall?

 

Instead of punching through the firewall, the power supply to the cold start injector (purple wire) is already in the engine compartment, is not used for more than a couple seconds, and is fused at 3A.

Just for grins, I just tested a spare sensor heater on a regulated bench supply, and at 14.2V (typical charging voltage) the heater current stabilized at 880mA after a few second of the initial surge to about 1.3A. The cold start circuit should handle that nicely.

 

I think I am going to delete the injector anyway. The purple is a constant 12v?

 

The cruise harness rubber gromet is where I put mine through. Poke around in your car and you may even find a better place

 

I found a spot where wire were already coming through. I was able to squeeze the wires through.