Quote Originally Posted by dave w View Post
There is a string of "Average IF" in the spreadsheet.

Average If, = Closed Loop
Average IF PE, = False
Average IF AE, = False

BLM's are not used and are Completely disregarded.

BLM's above 128 are lean.
BLM's below 128 are rich.

Increasing the VE table cell value (for example 2400 RPM, 70KPa) 68 to 78 will lower the AFR ratio (for example 15.2 AFR down to maybe 14.6 AFR, just guessing here to illustrate what will typically happen). Likewise if the BLM averages where 138 and changing the cell valve from 68 to 78 the BLM average will lower to 133, again just guessing.

PE is filtered to Average IF, PE = Active

To actually achieve 14.1, the Narrow Band O2 sensor voltages will need to be adjusted in the chip, which I've never done. The Narrow Band O2 sensor voltages are attempting to correct BLM's to 128 or 14.7.

I would first get the AFR's close to 14.7, then tweak the Narrow Band O2 sensor voltage to get the BLM's for E10 AFR.

Quite often BLM's and AFR's will contradict each other.

I like tuning with AFR, because the engine will run better than tuning with BLM's!

dave w