Datalogging with ECMspy and MegaLog question

[TheyCallMe]

Lately it seems like every time I ride for more than 10 minutes my AFV goes up to 117 or so. I've logged, analyzed, and remapped 7 times now and it's still changing that much!? What the efff is going on?

Does the AFV going up during logging change what the log looks like. In other words will it not change the cell as much because AFV is already way up there? Also, should I just disable AFV and log the same way like that? Performance and smooth riding doesn't seemed to have changed thus far and I'm feeling a bit defeated. If someone could add a little knowledge here I would appreciate it. Thanks a lot.

 

[buellxb9rs]

You should be setting afv to 100, turning closed loop off, changing afv min and max to 100 and open loop enrich delay from 3 to 0. also, make sure you use the updated map they you datalogged on when using megalog.

Try This Link For Help

 

[TheyCallMe]

Alright, thanks. I've been using that link but thought I should be doing the first part more before I went to the second. Which I think is what you are describing. I'll be doing that next. Thank you

 

[theMelvster6]

Are you using a wideband o2 setup or the factory narrow band? Without a wideband o2 you'll really only be able to tune the closed loop where the afr is 14.7. Any Afr other than 14.7 the narrowband just cannot effectively tune. The best way to do it it have extra bungs welded in the front and rear primary tube. Run a wideband o2 and feed the analog signal through the ecm, be sure to turn off o2 Sensor in ecmspy so you don't potentially damage the ecm with the higher wideband voltages...don't worry the wideband voltages will get bypassed through and be recorded by the datalog (which corresponds with the AFR it reads) Datalog and tune the rear cylinder and do the "plus 2" method on the front cylinder to get close. Then put the o2 sensor in the front primary and Datalog and tune the front cylinder. To keep normal closed loop function, tune the closed loop to 14.7 and anything outside of that to what ever afr you choose. A lot of guys just richen up the highest couple of rows on the fuel map. And tune to 12.5 - 13.5 @ WOT depending on what they are trying to accomplish.

 

[theMelvster6]

Same theory if you are tuning with tunerpro on a late xb or 1125

 

[TheyCallMe]

I'm only using stock narrowband. I'm sure wideband is the best way but I'm not sure I want to get into all of that. It's sometimes hard to just find time to ride so I just plug it in and log as I ride... hopefully it'll at least accomplish something!

 

[ich]

I'm only using stock narrowband.

http://www.ecmspy.com/ug_mono/V2.0/tuning.shtml.en#method_2