Dead MAF?

[Arun Rao]

If the fault code indicates MAF sensor, it probably is.  It's not unheard
of: mine went at about 100K, and the symptoms were much as you describe.  In
addition, my car had no power at all -- if I remember right, the ECU goes
into some kind of limp-home mode.

Don't know if parts vendors will let you do this in UK, but it's very easy
to put a new one in to see if it fixes the problem and return it if it
doesn't.  Or you could get a friend to lend you his ...

Good luck!

-Arun


On 5/17/02 5:42 AM, "Johnny Alpha" <johnnyalpha at beeb.net> wrote:

> Hi all,
>
> I think my MAF is dead and would appreciate any BTDT in confirming this is
> so. These are the symptoms:
>
> 1)    The fault occurred suddenly, without warning or
> 2)    Good idle, very erratic off idle
> (fits failure description on http://members.aol.com/c1j1miller/ecu.html)
> 2)    Check engine lamp lit, ECU fault code 2324 (Air mass sensor)
> 3)    Inlet tract pressure tests ok
> 4)    Pulling the 'Motor' fuses clears the error, until throttle taken off
idle
> 5)    Wiring continuity from MAF to ECU checked with meter as follows:
> MAF    ECU
> 1    24    (GND-From http://www.sjmautotechnik.com)
> 2    26    (GND)
> 3    7    (MAF Sensor)
> 4    25    (Burn off signal)
> 5    37    (+12V)
> 6)    With engine running, MAF pin 5 has +13.7V, pin 3 has continuous 0V,
> irrespective of RPM.
>
> I don't have a manual to confirm that pin 3 should have a varying voltage on
> it, but guess it should.
>
> The car is a '91 3B S2 Coupé. I know the S2 MAF has a larger diameter, but
> expect that it is connected and operates in the same manner as that on the
> 200Q20V.
>
> MAF: Audi 034 133 471 K, Bosch 0 280 213 007
>
> TIA,
>
> Ian
> UK
>
>
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