NGX/AFX Wideband off .2-.3 on the laptop

[PWNED]

Is there anyway to fix my wideband being off .2-.3 on my laptop? It is right off the battery for a good solid power/ground connection controlled by a switch.

[DSteck]

Try a solid chassis ground, and log the voltage values during a startup of the wideband. Post the results.

[PWNED]

I removed the - wire from the battery (for the WB) and made a new solid down to bare metal ground for the WB.

I did 2 scans (car in acc.)

The first was plugging the green connector into the HPT and you can watch the WB start flashing weird then I switched the wideband on and it started its count down.

The second was switching the WB on then immediately plugging the green connector into the HPT and waited for the WB to count down.

WB stayed around 14.6 but the laptop states different.

[DSteck]

Looks like you still have a slight floating voltage on the ground. Is there an existing ground anywhere you can try? Any time I have similar issues (I have six total of these widebands that I use as portable), it always ends up being fixed by using a different ground.

[PWNED]

Looks like you still have a slight floating voltage on the ground. Is there an existing ground anywhere you can try? Any time I have similar issues (I have six total of these widebands that I use as portable), it always ends up being fixed by using a different ground.

There is not an existing one. I would have thought the battery was the best place.

[DSteck]

Surely the car had a chassis ground somewhere in the engine bay.

[RonSSnova]

From the AFX manual:

The AFX?s display is designed to show AFR values based on a gasoline scale with 14.57:1 AFR as the stoichiometric ratio

In other words, the display you see isn't going to match exactly the number in the HPT log.

The grounding is interesting. If I read it all correctly, you need to connect the analog ground to the battery as well.

When utilizing the analog output feature of the AFX, always be sure to connect
the system ground (two BLACK wires) to the same location as the analog
SIGNAL GROUND (BROWN wire).

I'm not sure why they didn't do that in the harness for us?

[PWNED]

Surely the car had a chassis ground somewhere in the engine bay.

You are correct I wasn't thinking.

[PWNED]

From the AFX manual:

The AFX?s display is designed to show AFR values based on a gasoline scale with 14.57:1 AFR as the stoichiometric ratio

In other words, the display you see isn't going to match exactly the number in the HPT log.

The grounding is interesting. If I read it all correctly, you need to connect the analog ground to the battery as well.

When utilizing the analog output feature of the AFX, always be sure to connect
the system ground (two BLACK wires) to the same location as the analog
SIGNAL GROUND (BROWN wire).

I'm not sure why they didn't do that in the harness for us?

Interesting. I will have to look into this.

[MMGT1]

And switch to Lambda.... do it now before this AFR stuff makes you insane