tuning turbo car - LTFT still positive after OLSD tune
10-01-2006, 08:41 PM
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tuning turbo car - LTFT still positive after OLSD tune 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?
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?
10-02-2006, 05:28 AM
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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?
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?
10-02-2006, 07:03 AM
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Originally Posted by TAQuickness
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?
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.
