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OK, that's where I thought you were talking out. Yours is just in KPa rather than psi. that looks like anoher way to turn it off, compared to in the AFR parameters window were I've got mine to come on after 4200, the 2-step is set to 3500. Since I dont drive on the street he didnt worry about...

Can you post a acreen shot of that please? Now I do have my minimum rpm for O2 Correction to turn on set above the two step. Its under Parameters if I remember right.

Well, maybe this is a Fast only option? On my BS3 I have Positive and Negative Fuel Correction tables, but they are boost dependent, not RPM. I havent found anywhere to modify correction by RPM. In the cells near the 2 step RPM, my original tune seems to have low vaues relative to the other...

Thanks, I will check those and see where they are set

I may have run into the sensor life issue, as I think mine died while I was trying to adjust A/F while on the 2-step and right after the 2-step. I cant find anything that ties the 2-step (external Digital 7) to the tune, so I'm not sure what to do around the 2-step RPM. When it's on the 2-step...

Update, it's a Bosch 17205 Oxygen Sensor, best price online is Autoplicity @ $68. local parts stores wanted $100+ for it. Thanks for the replies!

Thanks very much! and that does make sense based on what I saw because the car ran the same ET and mph while "logging" the 14.38 AFR.

While testing this weekend I noticed a couple of what I thought were hiccups during a couple runs. The AFR would jump to 14.38 or so and then back close to target. I also noticed that near those times the RO2_Corr value went to zero. For fun, I loaded swapped in the first tune of the night to...

What is the typical end result of leaving the VE table alone and not adjusting the target? Mine is set around 12 at where the 2-step is (4k, 7 psi) and I see numbers jumping around in the 13-14 range. If the 2-step is cutting out spark, wouldnt the numbers show a rich condition? Thank you for...

Are you saying this would apply if we were comparing a dyno tune were you could slowly load vs. a race were the acceleration is much faster? I can't see a difference between tuning at the track vs racing at the track. I should have been more detailed - I am trying to tune at the track. I can...

From what I understand now, most people only use the Closed Loop function while tuning, not while racing. Why is that? What negative is there to having the Closed Loop on? It seems like it would be an extra level of safety. How do you disable the Closed Loop function, just set the "On" setting...

I use the 2-step in my 7AL and want to adjust it up, but I forget what setting I need to adjust in the BS3. I remember there was one, that maybe needs to be a certain level above the 2-step setting, but havent founbd it yet. For instance, if the 2-step is set to 4500, the setting in the BS3...

Well, on the 2-step A/F is 14.5, but everyone tells me you cant count that. But it takes about .6 sec after launch for it to come down to 11.5, so the lean theory makes sense. It revs quickly until A/F drops to 12.6 and between 12.5 and 11.5 is where the curve(s) stops rising. I see a Base_PW...

I know this is an open ended request. I'm just learning my BS3 and want to get an idea of what things should look like. I know the values are the important thing, but also wonder about the general shape of some of the plots. For instance, I have a slight decrease in the rate of chnage of...