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Where is the maf sensor?
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Old 18 May 2010, 08:26 PM   #1 (permalink)
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Where is the maf sensor?

Hi Guys,

I bought a my00 turbo 2000, and reading some of the threads here I think i have a maf sensor problem, I have bought a new one, but I have no idea where it is on the engine I did unplug something yesterday, engine carried on, but it must completely the wrong thing i unplugged, is it the one located on the pipe on the airbox,(near an arrow that says flow)?

Or is somewhere else, shes my first impreza, and im gettin quite worried.

help please
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Old 18 May 2010, 08:46 PM   #2 (permalink)
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Re: Where is the maf sensor?

Quote:
Originally Posted by TylerDurden View Post
s it the one located on the pipe on the airbox,(near an arrow that says flow)?
(
That sounds like it. What problem are you having? MAF symptoms are usually erratic idle when engine is warm with revs dropping quite drastically at standstill. When it gets bad car can stall.
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Old 18 May 2010, 08:52 PM   #3 (permalink)
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Re: Where is the maf sensor?

Hi Rikimaru,

Thanks so much for your reply The plroblems with the car are exactly what you have mentioned, and also quite a poor throttle response, Im not sure shes boosting properly either, so a boost gauge is on its way.

The sensor on the airbox, when unplugged, to me atleast seemed to make the car run a little smoother

She didnt stall or go hunting for revs.

The reason im confused is that it was just a clip type connecter i pulled out, but this new one is quite big
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Old 18 May 2010, 09:01 PM   #4 (permalink)
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Re: Where is the maf sensor?

Try

Scoobypedia | Trusted knowledge for everything Subaru | Knowledge / Sensors
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Old 18 May 2010, 09:05 PM   #5 (permalink)
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Re: Where is the maf sensor?

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Originally Posted by TylerDurden View Post
The reason im confused is that it was just a clip type connecter i pulled out, but this new one is quite big
The connector itself is not the sensor. The sensor is in the pipe from the airbox so what you probably have is the entire MAF assembly.
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Old 18 May 2010, 09:07 PM   #6 (permalink)
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Re: Where is the maf sensor?

Thanks for that, i have a slightly different engine, but there is something that corresponds to the diagram, it has a purple sticker and Denso written on it, could it be this?

Thanks

I must have been typing as your reply went up rikimaru, I will try and post a pic, for other newbies as dumb as me!
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Old 18 May 2010, 10:12 PM   #7 (permalink)
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Re: Where is the maf sensor?

Yeah that sounds like it. Purple Orange or Blue stickers.
If you remove the MAF from the housing in the inlet pipe from the air filter the car should stall if it's working ok. If it's knackered the car will keep running.
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Old 18 May 2010, 10:15 PM   #8 (permalink)
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Re: Where is the maf sensor?

clicky:- maf sensor
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Old 18 May 2010, 11:10 PM   #9 (permalink)
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Re: Where is the maf sensor?

Thanks guys,

just been out, had a proper look, i need to remove the two bolts, take old one out, stick new one in,

cant believe ive been so stupid!!

Well at least i wont make the same mistake again, will fit it in the day, and report back with findings.
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Old 19 May 2010, 05:53 AM   #10 (permalink)
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Re: Where is the maf sensor?

Nice one, it's midnight and he's still under the car ha ha ha. Glad we all helped a little, look forward to the update fella.
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Old 19 May 2010, 07:46 AM   #11 (permalink)
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Re: Where is the maf sensor?

count yourself lucky its the "cassette" type maf,the cheapest maf of them all
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Old 23 May 2010, 03:54 PM   #12 (permalink)
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Re: Where is the maf sensor?

Fitted the maf, reset the ecu, car is is idling alot smoother, revs freely when standing, but the not when moving.
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Old 23 May 2010, 07:14 PM   #13 (permalink)
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Re: Where is the maf sensor?

So you saying that it's still not running properly ?
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Old 23 May 2010, 07:26 PM   #14 (permalink)
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Re: Where is the maf sensor?

Yes mate, it does idle better, but the lumpiness is now present throughout the rev range when driving, it hasnt stalled etc at lights since I replaced the maf, Im not sure if its misfiring, but i suppose 25 on a compression tester is better than on loads of other stuff and then finding out I need a new engine(really hope I dont)

Have read it could also be the lambda sensor, if it passes the compression test I'll start exploring other areas.
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Old 24 May 2010, 08:10 AM   #15 (permalink)
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Re: Where is the maf sensor?

try closing the plug gaps,that normall helps,also it is more "surging" than lummpyness??..if so it could be boost related..
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