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Author Topic: Cleaning MAF  (Read 1681 times)

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laurie

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Cleaning MAF
« on: 20 November 2008, 12:44:38 »

As posted yesterday, i have done the paperclip test and got the 74, 73 error codes.
Now is it possible to clean the MAF or do i need to replace it. Stillnot sure if this is an intermittent problem or one that needs fixing perm.
Would the cranks sensor throw up these fault codes as well, or have past posts i have read been incorrect.
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rickyboy

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Re: Cleaning MAF
« Reply #1 on: 20 November 2008, 13:00:38 »

I personally wouldn't clean the MAF sensor you're likely to kill it.  Heard some folk spraying cleaner on it but last time I tried cleaning one it wrecked it. Is the car running rough?  The plug ok (and plugged in obviously)?

Probably better to get one out the scrappys, they don't cost alot.  They will brand new though.
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laurie

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Re: Cleaning MAF
« Reply #2 on: 20 November 2008, 13:27:55 »

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cem_devecioglu

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Re: Cleaning MAF
« Reply #3 on: 20 November 2008, 13:30:51 »

Maf is thin chemical layer and I dont think will like other chemicals..

may be a bit airflow to clean the dust but in your case wont help imho :-/
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feeutfo

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Re: Cleaning MAF
« Reply #4 on: 20 November 2008, 13:45:12 »

as far as i know, only ever spray with carb cleaner, never touch the parts within, they are brittle usually, as they work with a heated element, this is cooled by the air flow, and the amps used to keep a constant temp is measured to calculate the air intake or something like that, they are fragile by nature, someone on here got a new non vx maf for about 40 sobs iirc. Genuine 150 ish! Personally, i would not worry about spraying with carb cleaner, if its so fragile as to break under those circumstances maybe its in need of replacement anyway it seems to me.
And anyway, whats the alternative, er, by a new one? Provided your diagnosis is going in the right direction of course. As you say, the crank sensor is known to through other codes including maf before it fails or gives a specific c sensor code. With that in mind, i wonder if you would consider changeing the sensor anyway and see if that cures it. If not you have a spare, or at least you can avert a very common failure.
 General opinion is Maf failures are rare on the omega. But recent fuel trim codes look as though they may be down to a miss reading Maf sensor. I would encourage a few more opinions from more experienced members before proceeding. Hope that helps, ish?
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rickyboy

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Re: Cleaning MAF
« Reply #5 on: 20 November 2008, 13:47:38 »

Read the post, fairly simple one really.  As said already, check the codes again.  If there is no change from 73, 74 then run the car with the MAF sensor plugged in, without stopping the engine unplug it.  If there is no difference replace the MAF sensor.  They do fail although it is uncommon.  

The codes and poor running definitely point to the MAF sensor.  Buy second hand from the scrappys or try the for sale section on the site unless you have money to burn, brand new is very costly.  Good chance you'll get a working one for between £20-30.
« Last Edit: 20 November 2008, 13:48:16 by rickyboy »
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Marks DTM Calib

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Re: Cleaning MAF
« Reply #6 on: 20 November 2008, 14:14:15 »

Your codes do indeed point to a (rare) MAF failure.

I personaly would do futher work like monitoring airlfow using live data on a Tech 2 but, you dont have this as an option to you.

As far as cleaning goes, I would not use carb cleaner either.....I find that the foaming keyboard cleaner is by far the best stuff.

Do also check the wires to the MAF for damage etc
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laurie

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Re: Cleaning MAF
« Reply #7 on: 20 November 2008, 14:20:14 »

Anyone know anyone that is selling or got a good MAF. Secondhand?
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laurie

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Re: Cleaning MAF
« Reply #8 on: 20 November 2008, 14:29:35 »

Can you give me some pointers where to check for airleaks etc?
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feeutfo

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Re: Cleaning MAF
« Reply #9 on: 20 November 2008, 14:35:49 »

Quote
Anyone know anyone that is selling or got a good MAF. Secondhand?

Might be worth a pm to Marky Mark, Mutant Cav or Juev6.

Mark dtm. Whats issue with carb cleaner? Too aggressive?


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Kevin Wood

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Re: Cleaning MAF
« Reply #10 on: 20 November 2008, 15:27:54 »

Quote
Can you give me some pointers where to check for airleaks etc?

If you want a hand, or a bit of Tech 2 diagnosis, you're more than welcome to pop over. ( or I'll come yto you if it's not driveable. Only a couple of miles)

 :y

Kevin
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feeutfo

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Re: Cleaning MAF
« Reply #11 on: 21 November 2008, 14:38:40 »

Quote
Can you give me some pointers where to check for airleaks etc?
My understanding, which is not necessarily correct, but here goes, any air drawn it to the inductuion system which is not measured by the maf, ie unmetered air, can enter the engine and alter the combustion and alter the mixture leaning it off and give alsorts of strange running conditions.
 So any loose jubiled clips on the bag pipes splits in the corrigatted/gator sections of the air intake that flex with engine movement, any of the joints from the maf to the manifold to block gaskit, including plenum etc. As i understand it, with the combustion  measured/monitored right up to the the the 02 sensors,from what i have learned, i suppose an exhaust/manifold leak should be included as an air leak?
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