BrianC13

You unlikely need to adjust the throttle.  You will need to tune fuel, ignition, and idle control before you can expect a good idle.  

You can do a test right in the fan settings menu.

The physical gauge will be reasonably accurate. What the Laptop/ECU is showing is wildly inaccurate.
It's not the AEM gauge itself that's wrong. It's what's being output to the ECU that's wrong due to the lack of a dedicated Sensor Ground connection. The new model AEM gauges have a 2pin connection to the ECU and they are accurate.
But these older ones are only good to look at the readout from the physical gauge. Don't trust the data they send to the ECU.

The CAN gages on the market are pretty cool. Link sells ones that appears to be a private-labeled version of the GageArt unit. BTI sells another.
Bottom line, it can be configured to display anything the ECU is aware of. It can show one, two or four channels at a time. You can configure multiple "pages" and cycle through those pages with the touch of a button. Very nice.

What specific wideband controller do you have?

It's the White (0-5v Output) wire you want to connect to an Analog Volt input on the ECU.
Then create a Linear Cal for Lambda and make it 0v = 0.683 and 4.99v = 1.365.
I have to warn you though... This Lambda controller is garbage.
I used one for awhile and it gave terrible readings that changed day to day because it doesn't have a dedicated Sensor Ground wire.
It's good for a "close enough" overview of if you're "lean", "rich" or "about on target"... but absolutely useless to use for accurate Closed Loop control.