S40RCE:Smurf

<center><img src="http://www.vw-audi-specialists.co.uk/offer_images/airflow_meter.jpg"></center><p>There are TWO WAYS to fix the sensor the first one is the fastest way but used for emergenencies only the second one is for long term....so please read EVERYTHING.

The MAF sensor is very crucial to any VW or car in general. Let me first tell you what it does and how it works. The MAF sensor
stands for (Mass Air Flow) which pretty much senses how much air is going into the engine and then tells the
computer this information. The computer need to know how much air is going in because it then controls the fuel
injectors which spray more or less gasoline into the engine. So when more air goes into the engine, more gas is
sprayed into the engine. However when you have a faulty MAF sensor, you have a problem. When you have a
bad MAF sensor, pretty much it doesn't know how much air is going in, it actually thinks there is less air going in
so then the computer get this information and doesn't spray enough gas into the engine (and your car runs
lean), so then you have misfires, loss of torque, and your engine will rattle, and car will jerk when accelerating, and if your turbo charged, your turbo won't work...

Emergency Procedure:

Emergency Procedure:
To make the sensor think there is more air going in; we have TWO options: ONE is to do a simple modification to the MAF sensor, TWO is just to clean it properly which is what you should do.
First off, take off the sensor from the air intake box. The whole circular cylinder pipe part with the sensor. Not just
the sensor.
Now all you need is tape, use masking tape preferably, any other tape will work but it wont stick to the grill and
might get sucked into the intake manifold and that's bad.
Ok if you look inside the cylinder circular part you will notice a black rectangle, that's the sensor, but we won't be
touching it for the modification. Ok now take some tape and cover up the top and bottom part of the circular gritted area, leaving the
middle part open. What this will do is, when the engine is running, their will be more air hitting the sensor itself,
which is in the middle of the circular cylinder, instead of having the air be dispersed around it. Pretty much, we
just concentrated the air onto the sensor itself, and by this the sensor now knows there is more air hitting it. Now
the computer will send more fuel into the engine, and the engine should run fine. A simple fix that will last for a
while.
So here is what happened over time. The sensor got old and wasn't as sensitive to the air flow. Kind of when you
have nerve damage in a certain part of the body, some times for you to feel it you have to apply more pressure
for your brain to receive it. Same thing here, we need to apply more air pressure onto the sensor itself for the
computer to receive that information.


How To Fix Procedure:
-Take the sensor off the car
-Use isopropylene alcohol
-Flush it in a Ziploc bag


Is this possible???? Maybe Audi is ripping us off just by doing this and selling the "refurbished" MAF's back.


I have this on a word file, if anyone wants the picture please feel free to email me and I will forward it to you.

gabi_s4

that makes my gas millage worse? a friend of mine told me getting an intake makes MPG better

jtsai

mine went bad couple of weeks ago, 2nd time in 107k miles. not bad for a 90 dollar part. By the way, i have bosch sensor which is "supposed" to be less reliable than hitachi.

jtsai

for us HB guys, its a way of scaling the MAF reading.

Scenic Driver

And even then sometimes it only lasts a week or so.

Luckily on the TT's you can unplug it and the car will run fine (although rich) until you get a new one.

Schumiusedtowin

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jtsai

you can unplug it on the s4 as well