Faulty MAF, mass air flow sensor?

[skl63]

Guys,

I am pretty confident I have a faulty MAF (car idles well when it is disconnected). Is it possible to source just the sensor, without the housing etc (looks to be held in by 2 tamper proof screws).

Does anyone have a cheap source of this sensor? Car is a 2000 S8

Cheers
Scott

[ainarssems]

Check the Bosch part number(assuming it's Bosch) on it and search for it online.

[Dave McB]

The oe number should be 0280218067
The recon bosch number should be 0986280219

Iv got a brand new Bosch unit in the house I bought for mine that i never used that i can sell u if u like. (im a parts advisor for a large motor factors)

U can have it at my cost if u need it - it was 57.19 - if u want it u can have it for 60 quid inc postage.

[skl63]

Thanks Dave,

I will check the part number and get back to you later today,

Cheers
Scott

[Dave McB]

Sure pal, no hurry - it can sit there for another while if not needed for now. Im pretty sure it will come in handy at some point to someone

[HPsauce]

Originally Posted by Dave McB

Iv got a brand new Bosch unit in the house I bought for mine that i never

Is that the complete thing including the tube, or the smaller sensor unit that plugs in from the side? And 4-pin or 5-pin plug?
(I might be interested if not sold elsewhere)

[Goran]

Give it a clean, just for fun, nothing to lose. Take some readings before, put in a ziplock filled with Isopropyl alcohol overnight. Leave to dry. Put back in take more readings and plot the two together to see the difference.
I even brushed it gently with a glass fibre brush. I have one of these, but its too big, so I take a few hairs out and make a small bundle which can fit the opening to reach the metal element.
My theory is, if its gunk/oxidation on the metal element surface that's causing low readings, you need to gently scrape it off. Should be possible since thats how electronics contacts/boards are cleaned, IPA and glass fibre brush.

http://www.expotools.com/acatalog/10...ush-70530.html

or maybe look for a better thinner brush. Ideally a small 90-degree toothbrush with glass fibres is needed.

I can chop off some fibres from my brush and send them to you for free if you want to have a go at making yourself a home made mini brush. Perhaps from some 2mm aluminium tubing or similar?

[Dezzy]

Originally Posted by skl63

(looks to be held in by 2 tamper proof screws).
Cheers
Scott

They are Torx i think and just screw into the plastic, should be able to remove them.

[Sir WIll]

Gents,

Changing my MAF if cleaning does not help. Is the right part for a 2002 3.7 Quattro 434440240?

[Sir WIll]

Had the MAF out today and cleaned it with carb cleaner.

Now back in the car but not sure what readings I am expecting with VAGCOM?

Idle when warm is 680 and the MAF is reading about 4.5 G/S