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Auto MAF (the begginning)
So I've done my first AutoMAF log. The 2700-3300 range of the MAFFREQ/Ben Map kinda scare me.
Just to review my process first to make sure I'm doing it right.
b0120 set to 400 so I'm in PE mode all the time.
b3801 disabled, no LTFT
Logged MAFFReq in addition to my other PIDS
P0101 - p0103 set back to MIL
DFCO temp set real high to disable
Opened Log, then opened the B5001-MAF Calibration - LC1 WO2 BEN.map sample file. Change LC1 to my WO2AFR Ben and voila, my map filled in. See pic. I've also included my tun and log.
So I'm supposed to copy with labels, then paste and multiply with labels over the top of my B5001 right? What about those really high multipliers from 2700-3300?
What does the MAF Calibration LC1 WO2 AFR map do for you?
My car ran decent expect idle at stop got down to 500rpm. Makes you worry your gonna die out. That is probably another chapter later though.
Ken . . .
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Trying to understand the process
Bare with me guys. I've been trying to get my mind around what is happening here. See the pic below. I went ahead and hardcoded the huge multipliers to 2, figuring if they need to really go higher, the next few runs will keep making that happen.
Correct me if I'm wrong here.
My wideband is reporting that during that ugly red range, I'm really pumping 3,4,5 times 14.67 into the engine (Extremely Lean). So by using the BEN multipliers to tweak my maf settings, I'll be telling (correcting) my MAF that for these ranges you are really pushing a lot more air than you think. AFter I make those changes, the net affect will be ( for the cells I hardcoded to 2x) half as much air, therefore a much richer mixture?
Oh, and just to make sure, 1500 MAFFREQ represents idle closed throttle and the bottom is full throttle?
One more thing. The fact that I have went from 78mm throttle body to a 90mm Tb, and also put a fast92 intake manifold should affect my maf how? It thinks the air passing thru it is being handled by the stock intake and a 78mm TB. Could this be why it is so far off?