AFR reading while datalogging

egslim · Post by **egslim** » Mon Jun 21, 2010 6:52 pm

quick question. when i datalog my Air/Fuel line on the graph remains flat. what must i do to get it to fluctuate like all other graphs when i datalog?

Luke · Post by **Luke** » Tue Jun 22, 2010 12:42 am

i shall be flat, with a small rise when going into full load.
to see how the AFR "really" is, you need to log a wideband signal.
when going of the accelerator, there should be a peak to lean, but that's ok :)

regards Luke

egslim · Post by **egslim** » Tue Jun 22, 2010 12:11 pm

right that is what i am doing, I have my wideband wired into my ELD D10 in my S300J .

how ever if i data log the wideband reads a flat line straight across, no matter if i am cruising, WOT, or off throttle.
As i scrub through the log the AFR readings change ( the numbers ) but the line is flat.

It doesnt bother me that it is flat , cuz i get the readings i want, just wanted to know how come my graph line doesnt fluctuate as the numbers change

Post by **Spunkster** » Tue Jun 22, 2010 12:45 pm

http://www.hondata.com/forum/viewtopic.php?t=3772

egslim · Post by **egslim** » Tue Jun 22, 2010 12:55 pm

the car is a EG civic with a built B20VTEC motor, running the JDM P72 ECU with the S300J.

a test datalog is attached

Post by **Spunkster** » Tue Jun 22, 2010 1:39 pm

post your calibration and what wideband you are using.

egslim · Post by **egslim** » Tue Jun 22, 2010 10:21 pm

here is the calibrattion

Post by **Spunkster** » Wed Jun 23, 2010 10:24 am

It reads fine here. CHeck your settings for the AF in the sensor list to make sure it is set to display a range that makes sense, such as 10-20

egslim · Post by **egslim** » Wed Jun 23, 2010 12:10 pm

oh yeh it works. Thanks
lol
mine was 0.7 and 1.4