Also, should i run an inline fuse? If I should, do they come in different size wiring for the inline fuse, cause i have one for a stereo sitting around but is alot thicker than the power wire for wideband.
Thanks

 

Just get the power from the ecu. I don't have a fuse on it, on my car. But when I put it in other people's car I use one. So might as well add one in.

 

Straight to the battery, 13v constant.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VTC_CiViC &raquo;</TD></TR><TR><TD CLASS="quote">Straight to the battery, 13v constant.</TD></TR></TABLE>

I do that only when I am tuning other people's cars. I put a switch on the power side to turn it on and off.

 

When I use it on other people's cars to tune I use the ECU's ground and power. I really don't want to post pics or find out the pins, but basically if you look at the INSIDE of the ECU pinout you'll notice two have smaller gauge (bigger wire) wire. Those are power and ground yeloow is hot (positive). If it's on your car then add a capacitor or something to smooth out the signal from the O2.

If you post a pic of a diagram or something I'll point out which one's they are. BTW you can use any constant 12v source just ground everything to the ECU for the best signal clarity.