OK i got a question about O2 switch points... On my stock tune my O2 switchpoints were set to 450 across the board which would be roughly 14.68 AFR. I then tuned my airflow tables (VE and MAF) with my wideband to 14.68 in open loop, when i was finished i went back to closed loop fueling and my trims were all +/- 2 which is fine....

I read that lowering the O2 switch points to 350ish will lean the AFR out because the O2 sensors would be osciallating around 350 instead and 450... So i did that, i lowered the values that correspond to the low load area. So then I noticed my trims went positive or negative (I don't exactly remember I have the log at home) by a decent amount and the AFR leaned out like i thought.

Now here is my question:
1. Should i go back and tune my VE and MAF tables with trims to incorporate the O2 switch points to bring the trims back inline?
2. Should i just tune the MAF table with trims because from my understanding the VE table takes over in heavy/quick throttle transitions.

Thanks in advance.

 

e=mc2


but seriously you ask the hardest questions.

 

Excellent question, and I was wondering the exact same thing! Hopefully someone knows the answer and is willing to help out.

 

I believe I know the answer I just want someone more experienced and smarter than me to comment..

 

Corey, you have a PM

 

I already did corey

 

You do not want to re-tune your VE and MAF tables. VE and MAF describe air mass, which is not changing.