O2 sensor mod

[cannondale27]

Power commander does the resistor. It's still lean unless tuned

 

[hellflyer]

Power commander does the resistor. It's still lean unless tuned

Good to know! I just crimped it on the ground lead and it has a noticeably steadier idle and the sharp popping at 2700rpm is just a little puffing sound now.

 

[4StrokeAddict]

Power commander does the resistor. It's still lean unless tuned

Didn't know that. Good info bud!

 

[cannondale27]

In case of PCV all it does is prevent a code. O2 sensor is not used.

 

[hellflyer]

In case of PCV all it does is prevent a code. O2 sensor is not used.

OK! That makes sense, I was wondering how it works with the sensor.

 

[cannondale27]

That stock sensor is not even a wideband. If it does anything it's very little.

 

[4StrokeAddict]

Question, are you replacing the O2 sensor with a replacement to or adding it in series/parallel? I just relooked at the PCV instructions and that is completely unplugging the o2 sensor...

 

[hellflyer]

That stock sensor is not even a wideband. If it does anything it's very little.

That's what I figured!

 

[cannondale27]

Question, are you replacing the O2 sensor with a replacement to or adding it in series/parallel? I just relooked at the PCV instructions and that is completely unplugging the o2 sensor...

Replace. Haven't had a o2 sensor since.

 

[hellflyer]

In any case the resister changes the way it runs for the better IMHO !

If and when I do the hurricane turbo the sensor will be bypassed anyway!

 

[cannondale27]

In any case the resister changes the way it runs for the better IMHO !

If and when I do the hurricane turbo the sensor will be bypassed anyway!

Could be. Been awhile since it was stock

 

[hellflyer]

Could be. Been awhile since it was stock

I know it's hard to leave it stock! Especially since I can ride it yet and I don't want to touch it until I ride it. Haven't ridden in two years. Figures it's the winter with no snow!

 

[4StrokeAddict]

When adding an autotune on an MPI turbo setup, do you just pull the factory 02 sensor and add the one that comes with the Autotune?

 

[cannondale27]

Most wide band sensors use a bigger thread. I believe auto tune sensor uses the big thread 18mm so would need to add a second bung. I did find a adapter at Innovate but wasn't sure if the longer length would let O2 sensor work properly. The stock one is 12mm. Ended up welding a second bung on for my Afr gauge. No Auto Tune for me yet. Thinking about it though.
http://www.innovatemotorsports.com/xcart/product.php?productid=16315&cat=250&page=3

 

[4StrokeAddict]

There are two bunges on the MPI exhaust. Any idea if the unused one is 18mm? That second bung is welded on but there is no hole in the pipe. Looks like it needs to be drilled out. My plan is to pull it off the trailer Saturday and take a closer look if no one knows.