I'm using 03913 aem,as my multiplier but this thing is right sometimes and wrong others. My ground is perfect. I noticed 240ztwinturbo posted a different formula that I have yet to try.

I am going to switch to serial logging ASAP its just frustrating tuning a car when you doubt the accuracy of your wideband!

 

When researching the best way to do this on mine, and saw all the issues folks were having with the mod, it was an easy decision to go with the serial cable. I think it is overall easier to do that anyway. Strapped mine to the reflash connector, put a little velcro on the lower dash near it and on the serial-to-usb cable and off I went.

 

I spent two days trying to get it to work via the rear o2 signal. I swapped out all my parts and wires with another working aem wideband, sensor gauge and all wire, and still couldnt get it too work. I came to the conlusion its something internally wrong with the ecu. I know have a working serial to usb logging setup and its pretty dam accurate. The only thing I dont like is the extra usb cable you have to use for it.

 

WBO2 mod AFR readings are not as accurate as logged through the serial cable.

My formula is correct, but I usually see 0.2-0.5 AFR difference in 12-10,5 afr area.

 

Are you confusing accuracy with just a delay in logging? Possibly the serial is faster then logging through the ecu?

In any event, I set mine up through the ecu 1 time, in the rear o2 sensor position and have been using it that way for over a year with no issues.

I also have a tailpipe wbo2 sniffer that I use to tune cars without an o2 port or wbo2. I can log that with ecuflash as well using a usb port

 

I do not think it is a delay, as I have tested my LC-1 on a long dyno runs, using a solid flat 11.5 AFR during the whole run, logging TPS, Engine RPM, External wideband and WBO2.

 

I never used the analog out, serial from the get go...

 

yeah i had mine wired into the rear o2 spot and it worked for about 5 minutes and i never got it working again.

serial is sooooo simple.

 

wtf - My LC-1 has been hooked up to my rear O2 for about 3 years now I've replaced the sensor a couple times and recalibrate every few months. Other than that, mine has been rock solid.

John-

 

LC-1 been on my car for 5 years now. On second O2 sensor. This thing has been rock solid. Can't say the same for all the AEM's I've seen failing.

 

Old skool plx m300 on my personal car, two aem guage setups in friends cars, all 3 work fine for me through the rear o2 input....

 

I have been running AEM wideband through rear 02 since I put the wideband in and never had issues once I fixed the formula to match the gauge.

 

Hell, Aem wb's don't read dead on even with the ems. The closest I can get one is dead on at 14.7 but reads .3-.4 AFR leaner at 12.0afr in the logs. personally I just tune for a flat AFR in the logs then make a pull while watching the gauge, then adjust the whole table up or down to get the average AFR you want.

 

Mine reads rich in boost, I made the serial connector it's just a matter of doing it. And I actually got my fuel on gauge reading 11.5-9 while my logger maintains low 11's high 10's. analogue is faster than serial from what I understand so its likely to show more deviations maybe ?

 

I heard serial wast faster than analog..