06-17-2014, 05:35 PM
Join Date: Nov 2013
Total Cats: -154
Odd findings with AEM wideband o2 (35-8460)
I am really just completley stumped on this little thing? my readings in tuner studio are never matching, hindering me from tuning properly.
phil tobin that wrote the software for megalog viewer made me a new ini file that gave me an AFR calibration tool like the ms2/3 users get that linearly interpolated the gauge in tuner studio says to my physical gauge in the car.
it just seemed really odd to me that i was reading 17 AFR at 4.00 volts, that is almost an entire afr difference from what its supposed to be.
it just got me thinking that if somthing is not right at all with my WB
Directly from aem manual/instructions.
"An easy way to do this
is to disconnect the UEGO sensor from the
UEGO gauge. When in this state, the UEGO
gauge will output 2.35 volts. You can then
adjust the O2 #1 Gain until the O2 #1 Volt
s display in AEMPro reads 2.35 volts. "
So i did, with mega-squirt up and running and JUST the 4 pin part of the wire harness connected to the gauge, the gauge displayed 14.7-8 twitching the .7 and the .8 back and fourth very quickly and did not stop/settle.
TS SAYS: 15.0-.2 AFR (twitching)
and voltage on the o2 bank voltage is reading 2.6-2.63volts
also the small calibration switch on the back of my gauge is pointed diagonally up on the right side
(when looking at the gauge from the back directly in the middle)
ive been reasearching and twiddling with the thing for months and still cant get it completley right. I may take that next step and order a new sensor or just replace the system all together