Urgent reminder for all WB users.

[Dirk Diggler]

Dont forget to calibrate your Wide bands with Efilive's calc pids. what do i mean you ask. Upon inspection today I found my wideband AFR software differed from my logged (EFILIVE) AFR by .4 too rich. So I trued it up a little. Here were my steps in doing so

1. Hook up the wideband software and log the afr with the car off
2. Start the scanner and log the average AFR fom your WB(did this for about 2k frames)
3. Divide WB Software AFR/EFILIVE Scanned AFR 20.00/19.62
4. Modify your calc pids to reflect the changes eg.

"({EXT.AD1}*2+10)*1.0193679918450560652395514780836"

[Blacky]

Another thing to check is to make sure that you have the wide band O2 controller's ground (i.e. the ground that is being fed into EFILive's orange connector) connected to the same ground as FlashScan itself. Which is pins 4/5 of the OBDII connector. A very small difference in ground offsets may cause what you are seeing.

Disclaimer: IANAEE (I am Not An Electronics Engineer) - Ross might be able to clarify.

Paul

[Dirk Diggler]

My FJo unit doesnt have a output ground. I think its internally grounded to the cigarette lighter i hooked it to

[daveb]

I wonder if this is the right approach.

My unit was out at air similiarly. I am not sure we can assume that it is a simple linear correction across the whole spectrum.

It may be a bias (ie the voltage is always down hence the reading will always be down). I doubt this though unkess your scan earth and WBO2 earth are not tied together.

I assumed the unit was a little off at the extreme ends since it is very difficult to be accruate that far from stoich.

I think the only way to check your calibration is to test it with a known higher spec unit. Not easy though if you don't have access to a lab or something.

[VT2_SS]

Does EFILive support this product?

http://www.powertraincontrolsolution...ontent-26.html

thanks
John

[GMPX]

Does EFILive support this product?

http://www.powertraincontrolsolution...ontent-26.html

thanks
John

Wow, impressive device..
The answer is yes, it has a programmable analog out, so that is all we need.

Cheers,
Ross

[bink]

From FJO:

Some devices which have a 5 volt input may have too low of aninput impedance and will load down
the FJO's analog output signal. To correct this this, the published AFR vs Voltage data will need to be
adjusted. The following instructions explain how to do this using a digital voltmeter (DVM).
Note: The FJO digital displays are not affected by this and therefore are accurate regardless of what
devices you connect to the analog output.
1. Remove the sensor from the exhaust pipe, but leave it connected to the FJO controller.
2. Make sure that the analog output wire of the FJO is disconnected from your device's 5v
input.
3. Power up the FJO for 1 minute and measure the analog output voltage. Connect your
DVM's + (positive) lead to the FJO analog signal and the – (negative) lead to the ground
point of your device and record the voltage V1= _______ (to be accurate you must
measure all voltages to at least 2 decimal places).
MWI0003 rev D
17
4. Leave the FJO powered on with the DVM connected and power on your device.
5. Once it is ready, connect the FJO to your device and record the voltage V2= _______ .
6. The correction factor is obtained by dividing “V2” by “V1”, or C = V2 / V1 .
Note: The “corrected” voltage table data is obtained by multiplying “C” times the "published voltage"
for a given AFR, or Corrected_Voltage = C x Published_Voltage .
Example:
If the voltages you measured were V1= 4.723v and V2= 4.597
Then the correction factor is 4.597/4.723= 0.9733 .
AFR Published Voltage Corrected Voltage
11.009 1.217 => 1.185
11.875 1.564 => 1.522
12.605 1.833 => 1.784

This will do the same correction offset???

[Dirk Diggler]

Yes that will work but there was some difference between the voltage values and the AFR values so I used the AFR values instead

[mistermike]

Does EFILive support this product?

http://www.powertraincontrolsolution...ontent-26.html

thanks
John

Wow, impressive device..
The answer is yes, it has a programmable analog out, so that is all we need.

Cheers,
Ross

It should be fairly similar to LM-1. Supposedly the A/D has higher resolution than the LM-1. I think these are what I'll get for permanent installation.

[bink]

Yes that will work but there was some difference between the voltage values and the AFR values so I used the AFR values instead

Okay..Thanks. I'll use your method !!

Cheers,
joel