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You didn't trust me? :p

No, this is wrong. :o
Changing the stoich AFR value in the tune will effect fueling.
Why do you think the flex fuel OS' have a multi-row stoich AFR table instead of a single value? :doh:

Set it...

If you don't feel comfortable with using Lambda or EQ then
you can make a custom PID to reflect the stoich AFR value that is used in the PCM.
The analog signal can be converted from the programmed...

I'm using these in the same vehicle as in your sig and have no issues like this.
Try these settings.

What are the outputs programmed to & what is your Stoich AFR?

It could be an error with your PID expression.
The numbers will always be off slightly between the two because
the LM-1 will be...

The best way is to use Lambda or covert Lambda into your stoich AFR.
If your stoich AFR is not 14.57 then you need to make a new PID expression.

Spreadsheet for WBO2 PID expressions

Use Lambda or convert it to your stoich AFR.
There is no sense in using gas numbers for other fuel types.

You should ask F.A.S.T for the Lambda ranges, this way you can match your stoich AFR instead of theirs.

You will need to make a custom pid based off the Lambda range of the WBO2 and your stoich AFR.
Spreadsheet for this

voltage rang/lambda range
spreadsheet to help configure a custom pid.

I see what you mean.
It still doesn't make any sense to use gas #'s when using another fuel.

If you ever change to gas everything will be off.
Obviously that's not a problem if you stay with E85...

Are you comparing a PCM stoich of 14.7:1 against 9.76:1 stoich from WBO2? :crazy:

If so you should be tuning a skateboard and not a car.

Your WBO2 stoich should match the PCM stoich. :doh:

What's the MAP range for the impact factor and is there an evap time?
Thanks

Could you post it in .txt format?
I would like to see how they compare to the settings I have.

For WBO2's that don't have the option of changing the output
make a new PID expression to match your stoich AFR.

You're not stuck with the gasoline stoich/scale so why do conversions when you...

Based on the Lambda range above and stoich AFR=14.68
(Volts/0.7096)+9.072=AFR

(3.98/0.7096)+9.072 =14.68
(3.98/10.4166)+0.618 =1.00

Based off the Lambda range from the AFX manual (0.62-1.1)...

I confused AutoMeter for AEM. :doh:
That one is adjustable but only between 0v-4v linear.
NBO2's are around 1.1v max.

This would be the easiest way, if the AFR expression of (V*1.4)+9 was right.
With the Lambda expression of (V*0.096)+0.62 & AFR expression of (V*1.4)+9:
(3.958*0.096)+0.62=0.999968 Lambda...

It sets the AFR value of EQ1.
If you change it and use AFR instead of EQ or Lambda
change the WBO2 output slope or make a new PID expression to match.

Using EQ/Lambda eliminates confusion but ...

It's always like that.
The Lambda output converts to AFR based on the fuel setting,
you don''t need to select the use AFR bubble each time.

Do the settings reset or does the fuel type change to custom?
If so you may have a ground offset or a low voltage.

If LTFTs are positive they can carry over into PE.
STFTs do not influence PE, they will be 0.0% when commanded EQ>1.00

You may need a new WBO2 sensor.

OS 12212156 and the fuel segment from an '02 Express Van
is what Fbody people use when upgrading to the 99+ PCM.
I imagine it would work the same for Ybodies.

This is a popular mod, there...

Try using .bins from an '02 Vette and an '02 Express van.
OS 12212156