camaro1185

165ECM, 6E

I would love to know what is your process you take when tuning. For me, in excel I get rid of everything except Airflow, INT, BLM. I then look at the Airflow column and richen or lean it out depending.

1.
I was wondering what I should do if I have a reading of 10.6 G/S = 116BLM but on the MAF table All I have is either 9.5G/S and 11G/S.
If I do 128/116=1.103 that means I have to lean it out 10.3%, do I lean out both the 9.5 and the 11 G/S in the MAF table?

2.
Lets idle lets say about 10G/S my blm's are 130 (0 MPH) but lets say that I just accelerated hard up to 60 mph and the let off so I am just coasting at 60 (throttle closed, still 10 G/S), my blms now are 108. What do I do here in this situation, lean it out or richen it.

FWIW I did tune my idle to almost perfect, but that datalog was with the car in park just idling, so I do have an understanding of what to do.

RBob

iTrader: (1)

The ECM will interpolate between rows/columns of the tables. It is often easier to pick points that are closer to the actual rows/column index that the table uses. For MAF tables it is also easier to use the voltage, not the airflow.

See the tuning guide book sticky, chapter five, the '7165 section. The MAF Miscellanea thread shows how to put the voltage into the data stream. There are also some threads that have been recently updated that show the steps to do this.

Many times injector compensation changes are required. This can help when you see items such as you did in #2.

RBob.