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There are several tables that will affect ignition timing, the VE table should be tuned and fueling should also be tuned with a wide band.

When I tuned my car at 70 deg I was pretty much spot on at 12.5 - 12.8 AFR. Now the Jersey air is COLD and of course the power the car is making is sick but my AFR's are creeping over 13.0.

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Is there a 100% accurate way of determining if the engine ( LS2 ) is in SD mode?

The MAF was Failed over and she ran lean. I will do another scan...

I tried both. With identical results. That is why I assume the MAF is out of the equation. Also, when I move the PE table richer both commanded and actual get richer but the spread is still 11-12%...

Most of the writeups imply that PE mode is open loop. Correct? So this should be a VE issue? But after changing the VE for WOT there seems to be little effect , still a bit lean. Thoughts ??

Looks like I am running 11-12% lean. Notice the WOT 1:15 into the log. How can this be adjusted?

Thanks

Yes indeed. TPS and RPM seem to over ride all . Thanks again!!

Looks like I can set Delay Rpm to 0 and PE mode is immediate. What other markers for PE are you talking about?
Thanks

I have my PE "Delay RPM" set to 1000. But the car does not go into PE until much higher RPM. Any thoughts out there?

I want tune the VE table. Seems the 05 Vette does interesting things if the O2 sensor is left unplugged too long. I disconnected the O2 and installed the LC1 as WB only and did some tuning on the VE...

Humm???

Is it OK to VE tune with the STFT's on? Cannot seem to turn them off on this LS2. Any Ideas?

This is and '05 Vette. I got everything set up last night. LC1 going to PC and the A/C presssure. Hptuner PID ( y=Mx + B ) setup for AFR via the A/C pres. Seems like I have higher readings on the...

Not unusual as it seems . My car bone stock had plenty of KR. Basically the ECM will pull timing based on sudden intake air/TPS delta's , blipping throttle under load does this every time for me.

Basically the spreadsheet , program , or by hand should do the following:

Take each cell from the LTFT vs MAP vs RPM ( lets call it LTFT) and apply the following to the same cell in the VE table...

Aha. So I can put the LC1 in the front bung, the car will throw a code and go into OPEN loop. I can then do VE adjustements ( non-PE ) based on Commanded AFR and Real AFR. Then I can do VE...

Any thoughts. VE causing a lean condition maybe?

If I disable one of the rear O2's can I remove the sensor and put in my LC-1 to get WBO2 readings? Yes I know they will be a little off , reading ~ 0.5 leaner than actual.

So you start with stock? I would think that would lead to a lean condition. No?

What would be a good multiplier for the VE table with these mods? The engine can certainly breath better.

How do I know when car is in PE mode? I reset the thereasholds. Is there an indicator somewhere when running a scan?

Apparently the OS restricts the fan flexability. The best you can do is turn it on at 192 deg.

I set all the values to 90 ( percent I think )