DIY: Cleaning your Mass Air Flow Sensor

This section holds all DIY's directly related to the e36 chassis. Everything from changing the oil on the m3 to swapping an s54 into your 325i.

Re: CLEANING YOUR Mass Air Flow Sensor DIY

Postby DEFKON99 » Sun Apr 06, 2008 1:33 pm

ok thats 100% lol good job
Edge one looks like that stupid cube you buy to reset the brake pistons on doo doo cars -Proctor750

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Re: CLEANING YOUR Mass Air Flow Sensor DIY

Postby ali » Wed Apr 16, 2008 7:06 pm

Caligula wrote:
DEFKON99 wrote:ohnoes i hope u didnt use 50% alcohol ,


50% rubbing alcohol, 50% Grey Goose


lol sounds like a friday night.

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Postby searay77 » Wed Sep 10, 2008 4:07 pm

DEFKON99 wrote:hha yea could be a pain if you don't got another car to drive while the other is getting upgraded.

Update tho after 5 days of driving starting out @ 18.9 today ii checked the obc and it read out 21.2 so far so im positive that cleanign the MAF is def a must if you haven't yet.


New here and first post. Sorry for the old thread. My question is how many miles on your engine?
I have a 1995 325i vert with only 73,000 miles on it.
should I worry about this with low miles?
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Re: CLEANING YOUR Mass Air Flow Sensor DIY

Postby ForeignCarParts » Mon Mar 09, 2009 8:05 pm

I just did this :-)
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Re: CLEANING YOUR Mass Air Flow Sensor DIY

Postby DEFKON99 » Tue Mar 10, 2009 9:45 am

cool I did notice MPG go up did you ?
Edge one looks like that stupid cube you buy to reset the brake pistons on doo doo cars -Proctor750

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DIY: Cleaning your Mass Air Flow Sensor

Postby mzender » Wed Nov 11, 2009 5:16 pm

Here is the "barn door"(hot wire) style MAF sensor. Which mine is, so I took it apart and sprayed the wires and such with CRC Throttle Body and Intake cleaner, because it's basically carb cleaner but less harsh so it won't remove any special finishes like may be in some throttle body's. But yeah, holy dirty in their, had a good chunky black coat covering everything. No wonder it had a rough idle sometimes and had dead power spots when hard throttle through the rpm. I just pulled the big C-clips out then the mesh screens off the ends then sprayed the dangly with the wire in short bursts till the black crap was all gone. Blew in it to remove larger drips then let it dry. Wow night and day difference in how it runs, much smoother and released alot of power it was holding back from it.
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Re: DIY: Cleaning your Mass Air Flow Sensor

Postby Japan323 » Sun Nov 15, 2009 7:05 am

Do I have a film or barn door MAF?
98 euro 323i sedan, m52,auto.....(I know...it's supposed to be a 328,,,just neutered here in Japan..right hand drive)
thanks-<Mark
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Re: DIY: Cleaning your Mass Air Flow Sensor

Postby tontizzle » Tue Dec 01, 2009 6:02 pm

Very nice writeup mate, good pics! Just one question, how'd i tell if i got barn door maf?
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Re: DIY: Cleaning your Mass Air Flow Sensor

Postby DEFKON99 » Tue Dec 01, 2009 8:32 pm

this is the "Barn Door" Style
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Postby Molon_Labe » Wed Dec 02, 2009 6:29 am

DEFKON99 wrote:
ali wrote:Badass man! I got it up on the site. Good write up and really nice pics. what kind of camera?

-Ali


haha funny you say what camera its my phone Sony Ericsson K750i 2mp. cheap huh. im still dreaming about a nice SLR. :mrgreen:
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thanks all


lol.
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Re: DIY: Cleaning your Mass Air Flow Sensor

Postby mzender » Wed Dec 02, 2009 4:32 pm

So in other words when you say "barn door" style, you mean the "hot wire" style MAF sensor... Since our cars only came with the styles of MAF sensor, NON-VANOS motor has "Hot Wire"("barn door") MAF Sensor. The VANOS motor from 93 and up have the "Hot Film" MAF Sensor.
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Re: DIY: Cleaning your Mass Air Flow Sensor

Postby DEFKON99 » Wed Dec 02, 2009 7:34 pm

mzender wrote:So in other words when you say "barn door" style, you mean the "hot wire" style MAF sensor... Since our cars only came with the styles of MAF sensor, NON-VANOS motor has "Hot Wire"("barn door") MAF Sensor. The VANOS motor from 93 and up have the "Hot Film" MAF Sensor.


i thought it was the huge block on the outside of the MAf that looked like a barn door.. but yes
Edge one looks like that stupid cube you buy to reset the brake pistons on doo doo cars -Proctor750

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Re: DIY: Cleaning your Mass Air Flow Sensor

Postby mzender » Wed Dec 02, 2009 8:27 pm

Lol Oh. I was wondering where that term was coming from.
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Re: DIY: Cleaning your Mass Air Flow Sensor

Postby luketheduke » Wed Dec 09, 2009 9:22 am

I just did this today and i hope i see a change in my mpg! :D

cool let us know :D
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Re: DIY: Cleaning your Mass Air Flow Sensor

Postby coderighter » Tue Nov 23, 2010 12:23 pm

Related, but a little off topic. I recenlty purchased a '97 328 with 181k on it. The previous owner used a indy to service it. The indy insisted on using Mahle filters only. I decided to clean the MAF just because I was servicing everything. After giggling the bag for awhile, I could see no dirt, nothing. I decided to pour the alcohol back into the bottle. To make sure it was clean, used a paper towel lined funnel. The paper towel was spotless.

The moral of the story, well, you might lose a couple of horsepower over the "performance" filters but you can't really beat the 'stock' filter for protecting you engine.

Think of it this way, you could use 0W-20 oil to free up a couple horsepower, but who'd do that?

My 2 cents.
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