I'm trying to set up for logging/histogram of AFR error with AEM x series UEGO 30-0334 Wideband Hptuner MV12 (non-pro-version). I've read and re-read all the posts I can find here on the subject. Its supposed to be pretty much plug and play. I'm using post 2008 Canbus OBD2 (2010) pass thru. My understanding is that that this WB will work with my MV12 non-pro version correct? I've read countless posts and watched videos etc, and cannot get it to graph display AFRerror. Is it possible with the nonpro version?? I have the WB identified (correctly I believe) in the channel list as WB EQ Ratio 1 (SAE) sourced from the OBD controller, 02 sensors location. I have both AFR commanded and EQ ratio commanded in the channels list. I changed units in channel list for WB Eq to AFR. I cannot get a reasonable value for AFR error in the tables.
One post I read addressed creating a new user math based on the afr error math. My default afr error math has the first line (50120 afr sensor) pink as in not valid. I copied that math expression to create a new one and then changed that sensor ID value to 50127.238 (from the variable wizard) and its no longer pink. I used that user math expression for the parameter in a table for afr error. (units percent). That did not work (the 50127 identifies as a EQ ratio sensor ). My formula being 100 * [50127.238] ? [commanded afr] / [commanded afr]. Is the problem that the sensor is still identified as eq error sensor with lambda value?
What am I doing wrong? I get a value in the table for AFR error of -92, obviously not right. My AEM guage will report AFR, why can't I get my table to display AFR error?
Now my EQ ratio error appears to be working correctly and I guess I can use those values for adjusting trims except I'm a bit confused as I show the correct commanded AFR of 14.4 (from my stoich setting) but the eq ratio commanded shows 14.7 . So is the error it is reporting relative to the 14.7 value rather than my desired 14.4? Do I need to modify the math expression to correct if so how? And will the EQ ratio error also account for PE changes? One thing I did note is that the Eq math expression (that appears to work) has a ID value of 50199 for that sensor, wondering if I should be using that value for that sensor in the AFR math formula rather than 50127?
I'm sure someone has got this to work properly??? Any assistance appreciated. Note: I've done VE and MAF tuning with the narrowbands, now I'm trying get wideband tuning for mid to upper RPMs so i do have some basic working knowledge of HPtuners.