re. Wont rev above 1500 RPM then cooled, continued.

[Leif Karlsson]

It was (is) my impression that the MTFS *is* the sending unit for the
temp. gauge (and some other things, like a warning light above 120C) and
that the small one on top is connected to the fuel & ignition system. Is
this wrong? It's the one on top that I replaced (and it was broken
anyway).

I fixed the wiring to the MTFS just weeks ago, that didn't change a
thing (of course, the sending unit it self may be bad too).

Leif

ben swann wrote:
>
> Did you replace the Multi-Function Temp sensor (MTFS) on the bottom of
> the cooling neck, or the sending unit for the temp guage?  The error is
> a bad MTFS.
>
> Ben
>
> Date: Sat, 07 Jun 2003 14:34:56 +0200
> From: Leif Karlsson <leif.karlsson at mbox332.swipnet.se>
> Organization: Disorganization
> To: quattro <quattro at audifans.com>
> Subject: Wont rev above 1500 RPM then cooled, continued.
>
> Ok, Im still having trouble with this one.
>
> I have checked the idle switch: Works just fine.
>
> So I pulled the error codes. It told me that the temp. sensor is bad. I
> also got an error code that I don't recognize: 3434 (or possibly, 4343),
> anyone know what this on is about? Anyway, the last one don't seem to
> appear again.
>
> So I replaced the temp. sensor, still no good: The old one was
> definitely bad, the new one however gives me correct readings (about
> 2500 then cold and ~300 then warm) but the ECU still tells me that the
> temp. sensor is bad... And it doesn't run like it should then cooled, if
> anything it runs worse like there wasn't a temp. sensor at al.
>
> Bad wiring comes to mind, is there a good way to test if the ECU signal
> gets through al the way to the temp. sensor? Or is there something else
> that can make the ECU think that the engine is warm then it really isn't
> and therefor make it believe that the temp. sensor is bad?
>
> Any ideas are welcome.
>
> Best regards,
>
> Leif