Alright, I did some tuning on my turbo trans am, and am wondering what to to next. I did an open loop speed density tune using my wideband. Got the afr error down to 3% or less in basically all cells.

Loaded up my new VE table and did some scanning to check out the LTFT. Low and behold several cells are in the 10-15 range (all positive). In fact, many of my cells are positive, very few are 0 or 1.

Should I just tune based on fuel trims and ignore the wideband?

 

How do the trims look bank-to-bank? Hopefully they are pretty close.

I would give the WB another shot and shoot for BEN's in the .98-1.00 range before giving up on it. After that, you cold do some tweaking with the trims.

Safe to assume the MAF is sitting on a shelf?

 

After finding my misfire source (fouled plug) the trims look pretty similar bank to bank. What is a BEN?

I am still using the MAF at this point; not runnning that much boost.

 

did you calibrate the maf?

if not that could be the cause of your positve fuel trims.