Wideband O2 Wiring

[MrStabby]

The sensor has a 60cm lead and ends in a plug, and i'd like the get the plug inside the cabin to keep it clean. It might just make it to the shifter hole, and i could route it behind the exhaust heat shield that's bolted to the body near the cat. I cant see anywhere else that it could poke through. Anyone find somewhere better to run theirs?

[scotty nm35]

Which unit did you get?

I just ran a holesaw through the tunnel and put a rubber bung there, my controller is beside the bung under the carpet.

If you have the innovative controller, make sure not to mount it in the engine bay as the voltage regulator inside may overheat and fail, used to be a common problem I think and got them a bit of a bad name.

[MrStabby]

Yeah its an innovative unit. The plug is pretty big - i'd need to cut at 4cm diamater hole to get it. How big was the hole you cut? I was hoping to avoid drilling or cutting if possible.

[SECURITY]

How about through your guard? Or there should be a factory hole already drilled on the firewall adjacent to the turbo but you'll have to cut through the rubber for it to fit. Look harder mate.

[scotty nm35]

I shoved the sensor through, not the plug. You could always pop the pins out of the plug though...

[MrStabby]

I shoved the sensor through, not the plug.

Facepalm! Wow...the senility is really kicking in hard. Anyways the bung is the correct thread but the hole in the pipe is too small so i'm to to have to drill it out and run a tap through it.....

[scotty nm35]

Adam, the M18x1.5 tap is worth like $80, can you get the bung that came with the innovative welded on by a mate while the exhaust is on the car?

[MrStabby]

Adam, the M18x1.5 tap is worth like $80, can you get the bung that came with the innovative welded on by a mate while the exhaust is on the car?

80! Bugger! I guess i can get the inno bung installed at an exhaust shop. Silver lining is that I can put it in a better location to protect the sensor from ground damage, which was a bit of a worry.

[scotty nm35]

If you haven't got one already, drop an exhaust temp gauge in that old hole mate...

[MrStabby]

If you haven't got one already, drop an exhaust temp gauge in that old hole mate...

Tell me more;

- are they same thread but thinner sensor so should plug straight in?

- are they still effective that far from the turbo?

- which one/how much?

[scotty nm35]

The exhaust temp sensor needs to be right after the turbine outlet, usually where the stock o2 sensor bung is. My temp probe has a 1/8 bsp thread so you would need to weld up the old hole and tap it or just make an adapter from whatever the old thread was to the 1/8. You wont be getting true manifold temp there, so I always assume a 100-200 degree loss just to be safe.

I went for a cheap s/h stepper motor electronic one of a forum member, got it for $50 I think. They aren't expensive over in the states anyway. I got the Prosport one, it's been great.

Btw, the wideband bung is supposed to be a foot or two back and make sure there are no gasket leaks or these may fudge the figures. I put mine in the dump when I made it, due to space constraints.

[MrStabby]

Oh im rb26 with twins and have still have the narrowbands in for closed loop. The bung is on the front pipe after the merge about 20cms before the cat. Wont worry about the temp sensor then - I would have to run two and pull the turbos to get the extra bungs done. Thanks for all the help.