marky_boy 1 Posted May 4, 2011 Report Share Posted May 4, 2011 what exactly does the maf do? if you have the engine mapped with it off will everything be ok? reason i ask is my vr6 had it unplugged when i got her and i plugged it in and makes no difference to power at all. Link to post Share on other sites
bungy 2 Posted May 4, 2011 Report Share Posted May 4, 2011 The maf does exactly what the accronim stands for and that is Mass Air Flow sensor. It uses this information in the ecu's calculations but i'm sure someone will be able to explain precicely what or how. Link to post Share on other sites
marky_boy 1 Posted May 4, 2011 Author Report Share Posted May 4, 2011 yeah i know that bit. just wondered exactly how the info was used and why. and the reason my car runs quick with it uplugged and plugged in! Link to post Share on other sites
VR6Pete 1,455 Posted May 4, 2011 Report Share Posted May 4, 2011 If the car is no different when it's plugged in, it would suggest its faulty. Mine ran like a dog when it wasnt working.. Really lumpy idle and no power... Sometimes turbo / supercharged cars are mapped without a MAF but see no advantage on an NA VR6 Link to post Share on other sites
bungy 2 Posted May 4, 2011 Report Share Posted May 4, 2011 The MAF has a thin wire that heats up. The air rushing past it cools it. The computer measures how much current it takes to keep the wire at a constant temperature. Some MAFs have a temp sensor. Once the computer knows the outside temp and the "wind chill" it can determine the density of the air. It uses air density to calculate how much fuel to deliver. Link to post Share on other sites
UnitedMotorsport 55 Posted May 4, 2011 Report Share Posted May 4, 2011 The MAF is the main and only load input to your engines management system.With out it the ECU is taking a CALCULATED GUESS as to the amount of load the engine is under.There is ZERO benefit from running with out it, as the MAF is correct in every air flow/density situation, and obviously guessing is not. Link to post Share on other sites
marky_boy 1 Posted May 5, 2011 Author Report Share Posted May 5, 2011 the ecu is mapped for a z engineering stage 1 bolt on charger. but hasn't got one fitted. would it be an advantage to get a new maf and fit or would it make no difference? Link to post Share on other sites
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