[Terry335]

Has anyone else scanned the factory wideband sensors? I’m getting some wacky readings on mine and I’m not yet sure if they’re a byproduct of my scanning software, or accurate readings.

Just guessing based on what my scanning software says (I have not actually put a meter on the sensor yet, I guess that will be the next step):

1) It’s a current based sensor, with a range of -3 to 3 ma
2) 0ma seems to equate to around stoch (~14.7:1)
2) -.37ma seems to equate to around 13.5:1
3) -.65ma seems to equate to around 12.5:1

So to richen the mixture up under boost a full point, I’m guessing we need to figure out how to pull an additional .35ma from the ECU. I’m thinking its as simple as a ~40k resistor to ground on each o2 wire (assuming its 12v). Who wants to lend me a wideband for testing?

[CASHBY]

Terry, this reading is off your OBD2 Tool and new program you have?

I know stock we run pretty lean but not sure its that high. It would be nice to get an acutal wideband hooked up on the car to see the readings.

I really dont even trust sniffers that used on the dyno.

[Terry335]

Originally Posted by CEA 3

Terry, this reading is off your OBD2 Tool and new program you have?

I know stock we run pretty lean but not sure its that high. It would be nice to get an acutal wideband hooked up on the car to see the readings.

I really dont even trust sniffers that used on the dyno.

Yeah, I sent it back for a reflash from the manafac and the o2 values work now. I found a few cheap wideband setups on eBay, I'll probably get one of those for testing and sell it when I'm done. I can just throw it in the secondary o2 sensor bung on a temp basis.

[Terry335]

No one else has scanned their cars?? That would be scary!

[CASHBY]

Originally Posted by Terry335

No one else has scanned their cars?? That would be scary!

with that program that you showed me can you logg it?

[Terry335]

Originally Posted by CEA 3

with that program that you showed me can you logg it?

That one won't do O2 sensors or ignition advance. The only one I found to do it was Autella-Dynoscan, but it also is limited (slow refresh rates, etc).

[CASHBY]

Yea I figured, how about EGTs or IAT with this program? I havnt even got a chance to mess around with this yet.. But on my Audi's I have VAGCOM which basicly allows me to logg everything except wideband readings as well. i did some comparesents with that for the IC and showed the differences in IAT with a better IC.

in regards to the post over on that other thread, I was thinking about doing a comparesent with having an intercooler sprayer on the 335

[Terry335]

Originally Posted by CEA 3

Yea I figured, how about EGTs or IAT with this program?

in regards to the post over on that other thread, I was thinking about doing a comparesent with having an intercooler sprayer.

I don't think we have EGT sensors from the factory, but I didn't try IAT.

[CASHBY]

Originally Posted by Terry335

I don't think we have EGT sensors from the factory, but I didn't try IAT.

Yea, I think your right... I will see if we can log IAT.

[Terry335]

I ordered one of these to screw around with my o2 sensors:

http://cgi.ebay.com/ebaymotors/ws/eB...m=190120834161

It's around $325 shipped, and can be moved from car to car pretty easily. I've always wanted one in the toolbox for tuning.

[CASHBY]

Nice....always handy.

[danielg]

Where can I sign up for the Terry e90 email list?

signed,

One of your fans.

[A418t81]

Originally Posted by Terry335

I ordered one of these to screw around with my o2 sensors:

http://cgi.ebay.com/ebaymotors/ws/eB...m=190120834161

It's around $325 shipped, and can be moved from car to car pretty easily. I've always wanted one in the toolbox for tuning.

Cool. I have an LC1 that I converted to mobile use with the help of a hacked 12v cigarette adapter and some alligator clips on the ends of the ground/calibration wires