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Old 01-11-2017, 12:26 AM   #1
Gusbus
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Member#: 457691
Join Date: Nov 2016
Default Is it worth buying new maf sensor?

Hi all,

Will I benefit much from a brand new maf sensor? Stock one has been on the car since brand new (14 years) 01 gda wrx. With age do they get less reliable? Is they're a resistance check I can do to see if it's up to scratch? I've started cleaning it every so often since last year.
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Old 01-11-2017, 12:48 AM   #2
Netzapper
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Member#: 136137
Join Date: Dec 2006
Chapter/Region: RMIC
Vehicle:
2008 WRX
Silver

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They're pretty expensive to replace before they go bad. And your ECU is constantly doing the kind of basic check you're talking about. And I can't imagine how you'd check the sensor's calibration without really crazy equipment. So as long as it's doing its job, and your ECU is keeping the car running right, don't worry about it.
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Old 01-11-2017, 07:53 AM   #3
machineica
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Join Date: May 2012
Chapter/Region: South East
Location: morgan city louisiana
Vehicle:
2002 WRX,EJ20,VF30'd
PSM,5MT DCCD,RPF1 18's

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Replace it.
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Old 01-12-2017, 11:11 AM   #4
86Dreams
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Chapter/Region: Tri-State
Location: Harriman NY
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02 WRX S204 swap

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I vote replace. Peace of Mind.If youve cleaned it properly already then you can check if its broken if you can monitor/log commanded fueling vs Actual AFR. if its way lean or rich its broken.

also
https://forums.nasioc.com/forums/sho....php?t=2639657
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Old 01-16-2017, 09:22 PM   #5
Outbackxt413
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Depends on what you consider to be expensive. My mechanic seems to have at least one car in for maf every time I see him, it'll give you issues eventually. I'd replace it.
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Old 01-17-2017, 01:42 PM   #6
jon7009
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Join Date: Jun 2014
Chapter/Region: NWIC
Location: Oregon
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2003 WRX Flex Fuel
EJ205 TD04L FMIC SD

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Quote:
Originally Posted by Netzapper View Post
They're pretty expensive to replace before they go bad. And your ECU is constantly doing the kind of basic check you're talking about. And I can't imagine how you'd check the sensor's calibration without really crazy equipment. So as long as it's doing its job, and your ECU is keeping the car running right, don't worry about it.
checking the sensor's calibration without expensive equipment (also called scaling the MAF)
logging final fueling base, log wideband, log MAF volts
compare FFB to WB, multiply against MAF volts

basically laptop, tactrix, wideband controller+sensor. pretty much basic stuff for tuners.
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