Taking cal out of closed loop question

[Karl H.]

Due to the CLB set to 700mV the AT Basic is hunting for 14,2 to 14,4.

Karl

[Nexus9]

14.7? I thought it was lower than that. 14.2. Perhaps Joe Lyons can confirm.

It's 14.6 according to DynoJet. (Although it may be 14.7 for the older maps using a bias table)

The following changes are made to the tune file during the AutoTune process.

AutoTune Pro—automatically applies a .pvv to the tune that does the following:
• Sets the base fuel table to one static value, 13.0 for AFR or .89 lambda.
• Disables EITMS/PE/Adaptive Control.
• AE/DE are still active in the tune, but there's logic to disable or minimize learning when
they're active.


AutoTune Basic—automatically applies a .pvv to the tune that does the following:
• Sets the base fuel table to 14.6 for AFR based calibrations and .982 for lambda based
calibrations.
• Disables AE/DE/EITMS/PE/Adaptive Control.
• Retards 4 degrees of timing.
• Bias the close loop range to .700mv on AFR based calibrations.

General
• Sets calib to PVAT (Session Number).
• Clears adaptive fuel tables after flashing.

Sorry, late to the game here.

I'm not familiar with AutoTune, so this may or may not have value... but in TTS, 14.7 is just a "trigger" number that tells the program to use closed loop fedback in this cell.  The actual AFR is adjusted (slightly) by setting the "Bias Voltage" in another table from 250 to 800 (either of those would be extreme).  This biases (is that a word...?) the O2 sensor to produce an AFR of anywhere from 14.2 to 14.6/1, higher bias numbers being richer.