MAFT gets "learned out"
Thread Starter
Staging Lane
Joined: Jul 2003
Posts: 62
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MAFT gets "learned out" I've heard hear and there that the MAFT settings get "learned out" by the PCM over time (100-200 miles). On the other hand I see posts where the MAFT is used and the changes appear to "stick".
What's the final word on this?
(I'm running rich after installing FLP LT's and want to lean it out a bit...)
What's the final word on this?
(I'm running rich after installing FLP LT's and want to lean it out a bit...)
Re: MAFT gets Changes made to closed loop regions will be
"learned out", but the effect to non-closed-
loop will not. You need the "learning" to make
the PCM stop applying positive fuel trims that
stick with you into WOT, for example. There is
no need to (and no easy way to) make the
closed loop cruise go richer or leaner than
14.7 (other than the MAF signal effect on spark
advance). But trueing up the MAF meter is a good
thing because it makes the important regions more
consistently tuneable.
"learned out", but the effect to non-closed-
loop will not. You need the "learning" to make
the PCM stop applying positive fuel trims that
stick with you into WOT, for example. There is
no need to (and no easy way to) make the
closed loop cruise go richer or leaner than
14.7 (other than the MAF signal effect on spark
advance). But trueing up the MAF meter is a good
thing because it makes the important regions more
consistently tuneable.
Re: MAFT gets As said above,It will learn itself to 14.7-1 in closed loop .The point of a MAFT is to get the L-terms to 0 and then you can set your WOT A/F.If your trying to lean it out or richen it up (exhaust smell)then it won't do that.
