ECMlink ECMLink and PLX Wideband - EGR pin 15 won't log full range

[ErikTande]

I had my PLX wideband hooked up to the EGR (ECU Pin 15), but I soon realized it wouldn't log the full range (it would never log in ECMLink below 11 afr, even if the gauge itself was reading 10).

To remedy this, I wired the wideband into the Front O2 (ECU Pin 4) and enabled the narrowband simulation. Now my wideband is reading correctly in ECMLink, but because my WB sensor is on my downpipe, the physical distance causes a delay with the narrowband feedback when I'm in closed loop, so my AFR's swing back and forth a bit.


Is there anything I can do to fix this? Or will it be fine to run like this? I don't want to move the wideband sensor to the front o2 due to the heat.


I read something about adding a circuit buffer, will that allow me to run my wideband on pin 15 again and log properly?



*EDIT* I did more searching and found this, I'm going to try this out and see if it helps:

http://www.dsmtuners.com/forums/153131397-post6.html

In my experience, problems with NB simulation in ECMLink are usually caused by the delay and response time of most WB units. One trick to getting a more stock-like response with NB simulation is to start with STFTAdjRate values (on the STFTAndO2Feedback DA tab) set to about half their factory values, and then make small adjustments until it's dialed in.

 

[MY1GDSM]

The Egr Temp as an Internal 10k up resistor... Mostly it's just the AEM gauges that have trouble as they suck when trying to drive the inputs properly or with any kind of ground offsets and are notorious for issues like this regardless. I'd say use a buffer, But ECMlink doesn't carry them anymore as far as I recall.

Might just try to rewired the PLX to use a better ground also...

As I can't recall seeing any off hand that had any issues like this. How exactly is it wired in now?

Otherwise the post of Calan's Tells you one way to deal with this as you seen if you stay with simulating the W/b... You can also play with the Feedback rate as well as the response time is going to be much different than the stock o2 up front..

 

[ErikTande]

I did what Calan posted and it's responding MUCH better now. Resolved!