Fast idle good by REALLY lean - NOT VVE

[Behold]

Helping someone tune there VE GTS with an E38

When revved to about 2k in neutral the AFR goes to about 16-17 sometimes higher. But in gear under load in the same area on the VVE it's super rich. As we lean it out the fast idle gets leaner. This is almost like there is some correction table.

What might it be? It's stumping me.

Thanks.

[joecar]

Post log/tune files.

[Behold]

As requested.

The VVE is more updated now but understanding why its so lean only not under load would be great.

Thanks

CY09 - VVE TUNE - OL - BOUND2SMOOTH - NEWPCM - MFSCALE V1.5.ctz
OLdrive0019.efi
OLfastidle0020.efi

[joecar]

Helping someone tune there VE GTS with an E38

When revved to about 2k in neutral the AFR goes to about 16-17 sometimes higher. But in gear under load in the same area on the VVE it's super rich. As we lean it out the fast idle gets leaner. This is almost like there is some correction table.

What might it be? It's stumping me.

Thanks.

Are you running VE-only or VE/MAF...?

[Behold]

VE only. SD Closed loop longer term but tune is in SD OL mode for VVE tuning.

[Behold]

Joe did you notice anything?

I assume an idle correction is causing some leaning out. but surely fast idle would be outside the idle table?

[joecar]

VE only. SD Closed loop longer term but tune is in SD OL mode for VVE tuning.

Are you seeing an immediate MAF DTC...?

[joecar]

Try setting B8003 to all zeros.

[statesman]

Reset the fuel trims.

[Behold]

Done. No real difference.