Quote:
Originally Posted by GTOger
Thanks guys! Xfire... ya lost me there, man! Just to re-iterate, I'm just a dumb guy with a car, so acronyms like WB 02 and BLM are beyond me. Sorry for being an idiot and posting in the technical section.  |
There's no attempt here to make anyone feel foolish or stupid. Having said that, you can ask the questions to understand better. Corey is also very expert about this.
Basically, Marc and I have suggested using a scantool to better determine what's going on with the fuel trims in the calibration. The 128 is a BLM and means the fuel adjustment has reached equilibrium, neither lean nor rich.
"In a nutshell, the Block Learn Multiplier (BLM) is the long term fuel adjustment that the ECM "learns" to keep the air/fuel ratio within acceptable parameters. The Integrator is the same idea, only for short term adjustments. Basically, these two strategies are used to make adjustments and adaptations to the ever changing loads, atmospheric conditions, and fuel quality to keep the car's air/fuel ratio correct for driveability and emissions.
Also, keep in mind that when we say Long Term or Short Term, we are talking in computer time, not human time. In our ECM the Long Term fuel adjustment (BLM) happens about twice per second, while the Short Term fuel adjustment (INT) happens about 20 times per second."