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Old 11-05-2000, 05:25 PM   #1
jkyes
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Join Date: Jan 2000
Location: cottage grove, mn, usa
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99 Legacy GT
Quick silver

Question 99 legacy MAF

i have heard there is problems with the MAF in 99 legacy's when putting high flow intakes. does anyone have experience with this, could you give me some info. solutions, ideas, or is this not a problem. thanks...
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Old 11-05-2000, 06:00 PM   #2
nuburu2
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'97 SVX Ebony Pearl

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Try Larry's just completed intake at ImprezaRS.com. Won't be a problem!
Glenn
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Old 11-05-2000, 07:55 PM   #3
GTBGUY
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Location: Calgary, Alberta, Canada
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'99 BGP Legacy GT
'98 QS Legacy L (auto)

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I've been using the JC Sports Intake on my '98 Legacy L w/ no probs what so ever w/ my MAF sensor.
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Old 11-05-2000, 08:33 PM   #4
jkyes
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Quick silver

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i have heard there is a specific problem with the 99 legacy MAF. anyone heard anything?
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Old 11-05-2000, 10:49 PM   #5
DLC
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The MY99 MAF on the Imprezas is very prone to dying with aftermarket intakes. I'm not sure if the RS and Legacy share the same part for 99.

The 00-01 have a MAS.
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Old 11-05-2000, 11:34 PM   #6
BG5
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the 99 GT's have the same hot-wire MAF sensor
as the 98 RS' so whatever problems the 98 Impreza's have the 99 GT's will have too.

that said, the GT's generally don't have problems with their MAF's unless you over-oil a filter or something.
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Old 11-06-2000, 07:50 AM   #7
2.5GT
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I have a 97 GT which also uses a hot wire filament instead of the foil element MAF. It didn't matter, though. I blew my MAF after installing a high flow intake. Not much to say, except that it cost me $300 to replace. Oh well, looking for a dependable intake (God I miss the scream of that intake!!!).
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Old 11-06-2000, 08:39 AM   #8
Subie Gal
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Wink

99 Impreza's are the ones with issues...

99GT's??? never heard about issues with the MAF...

i've had my intake (Weapon R) since August of 99 and i have NEVER had an issue with the MAF

j.
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Old 11-06-2000, 10:46 AM   #9
Mx5racer
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The issue probably came from Sports Compact Car, who went through several MAF's on their project impreza after changing the intake (which lost the isolation from vibration). As I recall, this was specific to the 99 car. (other's will know better if it applies to the Legacy also).
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Old 11-06-2000, 10:50 AM   #10
silverSurfer
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1999 Legacy GT Ltd.
2006 Rav4 Sport Silvarrr

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so in other words, no real problem to the MY99 Legacy GT? I wasn't too sure of this myself and am kinda hesitant on replacing the intake. I just removed extra snorkus & installed drop in K&N Panel filter. Works fine for me, except that annoying whine..

-chrisC
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Old 11-06-2000, 10:54 AM   #11
CRAZY KEN
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Exclamation

I have a Weapon-R F1 intake system for MY99 Legacy 2.5 GT and so far it hasn't been giving me any problems...but if there was a problem, what would be a typical symptom!!! I installed my intake a year ago by the way!!! Oh, and does anyone one know the proper thing to do with the two pvc valve tubing...do I put a breather on it...adapt it to the intake plumming???

CRAZY KEN
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Old 11-06-2000, 11:12 AM   #12
Subie Gal
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here's a pic of mine...
i ran both into the intake system

<IMG SRC=http://www.subiegal.com/images/My%20Car/engine1-00.jpg>
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Old 11-06-2000, 02:33 PM   #13
Force[FED]
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The MY99 2.5GT uses the same MAF that was used in the MY98 2.5RS. I have the EXACT same MAF that my brother has in his 98 2.5RS, which is the MAF with the flat top on it(the hot wire setup). The MAF that was failing all the time is a cylindrical shaped MAF, with no flat area (film type MAF). The later type MAFs are much more sensitive to failure, but I have yet to hear of ANY of the hot wire types failing.

My brother has been sucking 8-10psi of pressure over his MAF for 25K miles, and it's fine. Us MY99 GT owners have nothing to worry about.

Enjoy!

Kev

Notice the top on the MAF on my car...this is the hot wire type! The film type MAF has a plug right into the cylindrical part.

www.lagging.com

[This message has been edited by Force[FED] (edited November 06, 2000).]

[This message has been edited by Force[FED] (edited November 07, 2000).]
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Old 11-07-2000, 09:26 AM   #14
jkyes
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99 Legacy GT
Quick silver

Thumbs up

cool that was the info i was looking for, it sounds like the things i have heard were about the 99 impreza and not the 99 legacy. that will expidite my search for a new intake. i currently have removed the silencer, and have added a amsoil filter. love it, but i think a new high flow type with a good muffler will be very nice. ah ah ah... more power
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Old 11-07-2000, 05:21 PM   #15
silverSurfer
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2006 Rav4 Sport Silvarrr

Post

Reposted e-mail from Trey Cobb:

<<Subaru has used a MAF sensor up until
the MAP sensors were used in some MY99 and the MY00 models. The big change
was that the MY99 MAF sensors were of a FILM type, instead of wire. This
means they are very fragile. Even the WRX/STI MY99-MY00 models are like
this. Vibration, heat, and oil/dirt will make these units fail very
quickly.

As for the MY99 Legacy using the film sensor, this I'm not 100% certain of.
I think it depends on the build date. I'd recommend being safe before being
sorry.

Thanks,
Trey>>

so hmmmmmmmmmmmmmmmmmmm???????

-chrisC
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Old 11-07-2000, 06:57 PM   #16
Force[FED]
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Again, it's fairly simple to tell what you have. If you get SCC mag, look at some of Shiv's write-ups, and in his pics you will see that his MAF (the hot FILM type) is a cylinder only, no flat surface. Then look at the picture of my car above, and you can see that the MAF has a large flat surface that the connector plugs into. This is the hotwire type. Then you can see what you have for yourself on your car!

Kev
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Old 11-08-2000, 08:35 AM   #17
Radio Flyer
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'98 2.5 GT Wagon
Rio Red

Exclamation

Putting in my 2&cent;,

The GT continued with the same DOHC engine until the 2000 model year when the body style changed as well.

We have the same engine used in the MY98 RS. Then, for the 2000 MY, the engines were made the same between the two cars. The GT was never saddled with the hot-film MAF.

Now, quit worrying and go have some fun!

&nbsp;&nbsp;- Eric
&nbsp;&nbsp;&nbsp;&nbsp;'98 2.5 GT Wagon - <a href="http://208.9.184.110/MembersList/ViewMemberPics.cfm?MemberID=143" target="_blank">Pics</a> - <a href="http://www.jeneric.ws/eric/radioflyer.htm" target="_blank">Page</a> -
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Old 11-09-2000, 04:44 PM   #18
jkyes
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Location: cottage grove, mn, usa
Vehicle:
99 Legacy GT
Quick silver

Post

ok i am done worrying. now lets drive!!!
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