Analog 0 for PLX

[Contella]

I see lots of advice here to NOT use a0 for 0-5v on S300, inability to run closed loop.
But for KPro the advice is..it's ok to use A0 for closed loop.

Is the platform what makes the difference?

I used A0 (just setting up new build) because of a youtuber saying it was a "cleaner signal" not going thru circuit board?
It appears D10 and clipping/de-soldering r136/138 is the way for closed loop in S300?

I will re-wire, but is he wrong about the signal?

Why would anyone want to use A0 for A/F? I assume for open loop only vehicle?

[Spunkster]

On the s300 you cannot run closed loop form the analog in puts on the s300 board. You must use the analog inputs on the ECU such as D10.

[Contella]

Thank you
On Kpro it's the correct connection? (probly my next platform)

[Spunkster]

Yes, for K-Pro you can run closed loop from the analog input on the K-Pro.

[Contella]

I re-wired the gray wire from PLX into D10. Now the DM-6 Multi Gauge Doesn't show anything in the center of the gauge where it normally reads "AIR", "14.5" etc...Is there a setting I missed? It's a new gauge and worked before I rewired. The led's around the outer edge come on and do the swinging arc display when I turn on key.
This is a new ECU, new S300, new LSVTEC re-build, used the ITR basemap and have been making the recommended changes to get it to idle and try to eliminate DTC's.
I really appreciate the help, I'm a total newb. Car was on an S200 when it spun rod brg. from low oil.
Also my tach isn't working now if anyone can help me with something I may be forgetting...wonder if the ICM went bad siting for 4 years...

[Spunkster]

It sounds like you have some wiring problems since rewiring it. Go back and check the wiring that has to do with these items.

[Contella]

Thank You.
I checked the wiring, it's fairly straight-forward as you know. I'm going to reset the gauge.

[Contella]

Well, DOUBLE-CHECKED the wiring, you were correct again, Sir
I had de-pinned (using staples 👍) the 4 wire clip (3 used,) going to the display to run the wire down my pillar. Upon re-pinning, I had the ground plugged into the narrow band output! 🤷‍♂️
I now have a full-function display, go figure.
Thanks Again!

[Contella]

My tach inop was blue wire broken completely at dizzy plug. Wow.
Now I'm seing Jeff Evans say don't use D10, (I am viewing tuning tutorial) says hes seen problems.
I am inclined to leave it on D10 with resistors clipped.
Am I wrong?

[Spunkster]

D10 should be ok to use