Block learn reaction times?

[Turbo6Smackdown]

Ok. When I make fuel changes on my translator, it does absolutely zero to my block learns on my scanmaster. How does my ecu not see those fuel changes? I'll add like 20% fuel, to see if my block learns will peg to 118 to try and compensate but nothing happens. Is my translator doing anything at all?

 

[Eric Stage I]

It depends on what area (load range) you adding fuel, what chip you have, and if it's in open loop or closed loop.

 

[Mike Licht]

the INT moves before the BLM watch that too

 

[JDSfastGN]

On my car I have to reset the ECM for the changes to take effect. I don't know if this is how its supposed to be but I would reset the ecm if you are using it to adjust BLMs.

 

[Turbo6Smackdown]

As of now I have the TT alky chip in. It's doing what it normally does, and I'm pulling or adding fuel at low load in idle ranges.

 

[Eric Stage I]

The BLM can't move if it's in open loop idle mode. Like JD said, you can make the changes in the Translator, then reset the ECM, and it will allow the idle BLM to relearn faster the next time you start the car.

 

[Turbo6Smackdown]

How often do your guys' block learns adjust, and what's the steps they adjust at? I know they fluctuate, but what's normal? Mine will go from like 118, then in 5 seconds it'll jump to 123, then in 2 seconds it goes to 127, and so on. It's never linear. The time they change isn't consistent, and the amount of numbers they change isn't either. Is this normal?

 

[Eric Stage I]

It could jump around depending on which BLM cell your are in. There are multiple different BLM cells for different conditions, so you might be jumping from one cell that is at 118, to another cell at 127. So what you are seeing sounds normal.

 

[Turbo6Smackdown]

Sounds good. Though how does one use this scan data for tuning or diagnosing purposes when it jumps that often? Isn't that why we don't use the integrator just for that reason? Isn't 118 and 126 completely different fueling conditions?

 

[Eric Stage I]

It won't jump around under steady state conditions, like steady cruising for example. For more in depth tuning, you need a powerlogger so you can see all the cells at once. But in general, if the numbers are +/-10 from 128, there's not much tweaking to do.

 

[Turbo6Smackdown]

Cool. thank you sir.