newb tuning question

[08z06]

I didn't, I tuned to 14.63. My guess is that my wideband controller is reading to 14.7 and I have 14.1 stoich 10% ethanol in the car. I will need to modify the calibration of my wide-band and see where i am sitting.

[08z06]

actually, now that I think of it I tuned to a 1.0 lambda on the tables but had to use a commanded AFR because I couldn't find a commanded Lambda PID. I have a bit of error in my tune. It's contradictory since I tuned to a 1.0 lambda, the AFR gauge used 14.7 stoich, so in theory by using 14.1 stoich gas I should be running a little lean. This doesn't match up with my long term fuel trims. I'll have to log to compare.

[joecar]

What Lambda does the wideband report...? around 14.83

What wideband do you have (what does it assume for stoich AFR)...? TechEdge 3A1... it would be close to 14.83.. I'd have to check the programming.

What fuel are you running (what is the alcohol % content)...? 10% Ethanol 93 Octane

What is the stoich AFR set in your tune...? close to 14.83.

see info above

see info above

No, I'm asking to see Lambda, not AFR ( lambda is regardless of AFR )

If your tune is set to AFR 14.83 and your wideband reports AFR 14.83 then your air modelling is good if the tune's stoich AFR is the same as the fuel's stoich AFR and as the wideband's stoich AFR... so let's use Lambda for this very reason (3-way assumption of stoich AFR).

[joecar]

I didn't, I tuned to 14.63. My guess is that my wideband controller is reading to 14.7 and I have 14.1 stoich 10% ethanol in the car. I will need to modify the calibration of my wide-band and see where i am sitting.

actually, now that I think of it I tuned to a 1.0 lambda on the tables but had to use a commanded AFR because I couldn't find a commanded Lambda PID. I have a bit of error in my tune. It's contradictory since I tuned to a 1.0 lambda, the AFR gauge used 14.7 stoich, so in theory by using 14.1 stoich gas I should be running a little lean. This doesn't match up with my long term fuel trims. I'll have to log to compare.

You are supposed to set the commanded EQR (or Lambda) and tune the air tables (VE and MAF)...

post your tune file and a log file...

the commanded Lambda pid is either (whichever one responds correctly) SAE.LAMBDA or 1/GM.EQIVRATIO or E38.AFRATIO_DMA divided by B3671 (from your tune file).

[joecar]

Commanded fuel tables:
B3618 (PE)
B0141-4 (OL)
B0138 (Cranking)