Dave do you have a pin out pic like above for a 6395 eco that’s in my truck? Or where can I find one..
Thanks

Thanks Dave!!

What’s the best way to add a ground to the 3 wire O2?? Ground the exhaust somehow to the frame?

Ok so where does the 3 wire O2 ground? ECM??

Is the 4 wire O2 just have an extra chassis ground? So its not using the exhaust to ground the sensor?

Ok got it so one of the white wires be ground then?

Correct me if this is not right>TBI uses a NB O2 so its rich or lean so if a WB O2 is in the same area of the exhaust that the NB is with a separate controller like a LM 1 what would your advantage...

I cut a good 3/16 off of the bung and put another bung up from that one that is in more in the flow of the exhaust.. when I get my chip back Ill test it to see if it makes any difference when its...

Well let me retract that this is an aftermarket front pipe with a converter and I’m not sure if its in the same location as original but I do know that the O2 wires are a little taught..
Any one...

Yes that’s stock location...
No its Ed from fast chips...I have heard to stay away from Harris performance..

Dave it is a 3 wire I should have posted that sorry. But I would still think it should work better if its up stream closer to the engine.

I’m new here and to TBI tuning so bare with me. After reading threw the O2 placement that EagleMark posted I think I need to move my O2.. I have a 94 c2500 pickup with a 383 in it that I just...