friday I was working on a Grand Am 3.4L 2002
when I tune the MAF to have a good idle, (AFR 14-15:1) the driving was horrible too lean (16-18:1)
when the idle was about 12-13:1 the driving was fine...
I'm novice with MAF tuning
I see that when I was at idle I was always below 2800 Hz, so I ajust my tables (1500 to 2800 Hz)
I attach 2 calibrations, 2 datalog and the config files
I hope you could help me
Im working on my MAF tune right now, granted I am using an LS1 MAF on my GA, but from what I have found it that the 3400 is best tuned for MAF using the method from "Russes OL MAF tuning" for the lower ranges up to 7500hz and make a custom histogram and tune the upper range to 11500hz using LT + ST fuel trims.
Like I said, just working on this right now, not completely done yet, but seems to be working OK.
2004 Grand Am SC/T- Eaton Magnuson M62 supercharger, 2.6" pulley, EGR delete, Greddy PCV oil catch system, 42.5lb/hr injectors, LS1 MAF, custom CAI, cooling mist meth injection system
do you know why I'm not able to tune it?
You need to log the commanded AFR in order for the Maf AFR Error % histogram to work. And you must disable closed loop & reset the fuel trims when tuning the AFR.
Russ Kemp
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