MAF Sensor CLEAN'D on my N55 | DIY included - BMW 3-Series (E90 E92) Forum

FrankiE90 · 02-17-2011, 04:54 PM

Just got done clean'n my MAF sensor.

It's around that time for service when they change ur
air filter and oil. And with my N55 I'm rocking Harold's foam filter.
so i don't need a new filter just need to clean it and recharge.
but i do need to look at the MAF sensor.

There were concerns of oil residue build up because i'm
using a foam filter and better than wait for any kind of
potential build up, I figured why not clean the sensor on a regular
basis.

pick'd up a bottle of CRC MASS AIR FLOW cleaner and
did some cleaning.

When i first pulled off the sensor, i made sure to look for
any sign of oil - didn't see any. The sensor appear'd to be
clean without heavy blotches of dirt or oil stains.
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Size: 55.2 KB

drove it around after the cleaning, and i have to say
it does feel better. It's simple to do and I don't see why
I wouldn't continue to clean the MAF sensor after every oil change.

i figured this would be pretty good maintenance practice
so i did a DIY.
http://www.e90post.com/forums/showth...46#post8937746

creaminz · 02-17-2011, 05:25 PM

What happens when you have dirty MAF sensor? Or Cracked MAP sensor housing?

P.S. White Lexus IS w/Gold rims?

Jeff@TopGearSolutions · 02-17-2011, 05:27 PM

Dirty Maf -Inaccurate reading of air, results in poor gas mileage and performance.

As far as cracked map sensor housing? Be more specific? What part is cracked?

creaminz · 02-17-2011, 05:34 PM

Quote:

Originally Posted by JPSlick

Dirty Maf -Inaccurate reading of air, results in poor gas mileage and performance.

As far as cracked map sensor housing? Be more specific? What part is cracked?

One that attached to the STETT Chargepipe on N54. I noticed that piece has crack. Also clip was broken as well, connector is connected but not secured properly. That MIGHT be the reason why I was loosing power even with Meth? Does loose/cracked MAF sensor housing cause any noise while driving? Whistle, humming ect. ?

Jeff@TopGearSolutions · 02-17-2011, 05:35 PM

Quote:

Originally Posted by creaminz

One that attached to the STETT Chargepipe on N54. I noticed that piece has crack. Also clip was broken as well, connector is connected but not secured properly. That MIGHT be the reason why I was loosing power even with Meth? Does loose/cracked MAF sensor housing cause any noise while driving? Whistle, humming ect. ?

I'd imagine if air can escape you could be getting some false readings, as well as a boost leak. I would look into a replacement perhaps. If its a potentially leaking boost, it may hiss/whistle. Not all boost/vac leaks make noise though.

creaminz · 02-17-2011, 05:39 PM

Quote:

Originally Posted by JPSlick

I'd imagine if air can escape you could be getting some false readings, as well as a boost leak. I would look into a replacement perhaps. If its a potentially leaking boost, it may hiss/whistle. Not all boost leaks make noise though.

Ye as soon as I saw the crack, I placed an order with Tischer (Jason & Evan are great guys btw). However, no codes/SES were thrown. If replacing MAF sensor fixes my anonymous whistle at 1/3 throttle then I will be soooooo stoked

Jeff@TopGearSolutions · 02-17-2011, 05:40 PM

Quote:

Originally Posted by creaminz

Ye as soon as I saw the crack, I placed an order with Tischer (Jason & Evan are great guys btw). However, no codes/SES were thrown. If replacing MAF sensor fixes my anonymous whistle at 1/3 throttle then I will be soooooo stoked

Def a good move on replacement. Sounds like it may have been over-tightened or just muscled the wrong way during installation.

creaminz · 02-17-2011, 05:42 PM

Quote:

Originally Posted by JPSlick

Def a good move on replacement. Sounds like it may have been over-tightened or just muscled the wrong way during installation.

Probably happend during Turbo swap but it's okay. Will report back once I replace it with new MAF sensor

lpphreakx06 · 02-17-2011, 06:09 PM

Looks good, might want to do this to my n54.

FrankiE90 · 02-17-2011, 06:13 PM

only u and Ivan pointed out that
Lexus IS-F,... baller at my work w/ the f'd up exhaust tips.

not gold wheels - just bright sunset.

JPSlick answer'd 4 me, thanks.

Iceberg3 · 02-17-2011, 06:49 PM

Thanks for this DIY Frankie!

My mpg has gone to sh!t and this could be the reason since I drive fairly conservatively.

WilliamE92 · 02-17-2011, 08:32 PM

y u so maf tho?

CPWINCH · 02-21-2011, 10:51 PM

can bmw do it for you?

02-17-2011, 04:54 PM	#1
FrankiE90 Major General Drives: 2011 E90 Space Gray™ Join Date: Feb 2008 Location: Pasadena, Ca Posts: 8,500 iTrader: (10)	MAF Sensor CLEAN'D on my N55 \| DIY included Just got done clean'n my MAF sensor. It's around that time for service when they change ur air filter and oil. And with my N55 I'm rocking Harold's foam filter. so i don't need a new filter just need to clean it and recharge. but i do need to look at the MAF sensor. There were concerns of oil residue build up because i'm using a foam filter and better than wait for any kind of potential build up, I figured why not clean the sensor on a regular basis. pick'd up a bottle of CRC MASS AIR FLOW cleaner and did some cleaning. When i first pulled off the sensor, i made sure to look for any sign of oil - didn't see any. The sensor appear'd to be clean without heavy blotches of dirt or oil stains. drove it around after the cleaning, and i have to say it does feel better. It's simple to do and I don't see why I wouldn't continue to clean the MAF sensor after every oil change. i figured this would be pretty good maintenance practice so i did a DIY. http://www.e90post.com/forums/showth...46#post8937746 __________________ FrankiE90 AKA:.[The TANK] *CLICK THE SIG 2011 335 E90 MTECH 6MT • KW V3 • INJEN Intake • Berk 4" DP • Vanguard V2 exhaust • Procede V5 • Stoptech BBK • RPI Scoops • Karbonwerk CSL Trunk • LUX H8 • 19" BBS LM • 18" BBS GT4
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02-17-2011, 05:25 PM	#2
creaminz Major General Drives: E90 LCI Join Date: Sep 2005 Location: So. Cal Posts: 6,943 iTrader: (31)	What happens when you have dirty MAF sensor? Or Cracked MAP sensor housing? P.S. White Lexus IS w/Gold rims? __________________ LTBMW \| 1013MM \| HRE \| KW \| VANGUARD \| E90.1.2.M.LCI \| VISHNU \| 1013MM Photoshoot \| VRSF

02-17-2011, 05:27 PM	#3
Jeff@TopGearSolutions BimmerPost Supporting Vendor Drives: C6 Z06, GSXR-750, 09 335i Join Date: Dec 2008 Location: TopGearSolutions.com Posts: 12,484 iTrader: (25)	Dirty Maf -Inaccurate reading of air, results in poor gas mileage and performance. As far as cracked map sensor housing? Be more specific? What part is cracked? __________________ Latest Discounts and Specials Email Me! Jeff@TopGearSolutions.Com Evolution Racewerks Charge Pipes and FMIC Sale ETS FMIC INTERCOOLER SALE! Cobb AP for BMW N54 & N55, Lowest Price! MEMORIAL DAY DISCOUNTS!!

02-17-2011, 06:09 PM	#9
lpphreakx06 Professional Moose Racer Drives: SG 335i E92 Join Date: Jul 2008 Location: Bellevue, Wa Posts: 7,241 iTrader: (25)	Looks good, might want to do this to my n54. __________________ BMW Dream Team PNW Chapter, member #1 \|HP Autowerks \| AR DESIGN \| BMW PERFORMANCE \| STOP TECH \| Volk Racing\| AMS \| ARKYM

02-17-2011, 06:13 PM	#10
FrankiE90 Major General Drives: 2011 E90 Space Gray™ Join Date: Feb 2008 Location: Pasadena, Ca Posts: 8,500 iTrader: (10)	only u and Ivan pointed out that Lexus IS-F,... baller at my work w/ the f'd up exhaust tips. not gold wheels - just bright sunset. JPSlick answer'd 4 me, thanks. __________________ FrankiE90 AKA:.[The TANK] CLICK THE SIG 2011 335 E90 MTECH 6MT • KW V3 • INJEN Intake • Berk 4" DP • Vanguard V2 exhaust • Procede V5 • Stoptech BBK • RPI Scoops • Karbonwerk CSL Trunk • LUX H8 • 19" BBS LM • 18" BBS GT4 Last edited by FrankiE90; 02-17-2011 at 07:00 PM.*

02-17-2011, 06:49 PM	#11
Iceberg3 First Lieutenant Drives: 2011 E92 M-Sport 6MT Join Date: Jun 2009 Location: The city that never sleeps! Posts: 388 iTrader: (1)	Thanks for this DIY Frankie! My mpg has gone to sh!t and this could be the reason since I drive fairly conservatively.

02-17-2011, 08:32 PM	#12
WilliamE92 First Lieutenant Drives: 2013 EB F30 335 MT Join Date: Aug 2009 Location: CA Posts: 313 iTrader: (1)	y u so maf tho?

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