Just wondering what kind of number to expect if I unplug MAF sensor. Thanks.

I did this one one of my vehicles so long ago i don't remember exactly ,I did it mainly to disengage the EGR. Others have stated on this forum that they increased by about 2 mpg which sounds about right. Hope this helps. Of course, it does whatever it does. I would just do it and measure your own. BTW my others have GDE tunes so there is no need.

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05 Blu LIM, OME GDE Tbo, wk II 245/75/17, KC Lights, bull bar, 195K H TC
05 Blu Lim, Dayton, GDE HT, 255/75/18 , 210K , H TC
06 Bla Lim, GDE Eco, Destination AT 245/75/17, 151K, H TC
06 D Khaki Lim 126K wkII Eur TC
05 D khaki Lim 145k refurbishing
All CRDS: Fumoto, Lift , Fan Shroud mod, fuel head Gen II, SAMCOS,self TB, 2 Mic filt, Hayden