Question about LTFT

[joecar]

Here is a run with the changes

Attachment 20287

Attachment 20288

You set PE to Lambda 1.175 (i.e EQR 0.85)... this is why your log shows EQR 1.0 during WOT (PCM will not go leaner than EQR 1.0)... this is dangerously lean.

when you look at B3618 or B3605, pay attention to the units (see upper right panel).


Do this:
- open tunetool,
- go Edit->Properties and set Commanded Fuel Units to EQR, and click Ok.
- exit tunetool,
- restart tunetool,
- goto B3618 and set it to EQR 1.175.
- save file and flash to PCM.

[Dirktdolman]

Original Value in the 1500 hz cell was 0.209783. I added 12% to that, making it 0.23495696. So do I add another 3.5% (making it 0.2420056688) or remove 3% from the 0.23495696 (making it 0.227614555)?

[Dirktdolman]

Is this what you are talking about?

[joecar]

Original Value in the 1500 hz cell was 0.209783. I added 12% to that, making it 0.23495696. So do I add another 3.5% (making it 0.2420056688) or remove 3% from the 0.23495696 (making it 0.227614555)?

Sorry, I meant take 3.5% back out.

[joecar]

Yes. Click the +.00 button to increase precision

[joecar]

Sorry, I meant take 3.5% back out.

After adding 12%, take 3.5% back out.

[Dirktdolman]

Here are a couple runs I made today with the new settings.

LS1B_0210.efi
LS1B_0211.efi
LS1B_0212.efi

2003 Chevrolet 2500 HD LT 6.0L Auto 4X4 LS1B (OS 12593058) B5001 with 8.5 perct increase.ctz

[joecar]

Ok, trims look to be closer to zero...

there are a few things I still don't like:
- I like to see the HO2Sx1 voltages get to 920 mV, but your log does not show any WOT.
- I like to see no KR.

[Dirktdolman]

Not sure about the HO2Sx1 but I did see the KR. What do I need to do?

[joecar]

What fuel are you running...?